Earbuds / Compare

Bose Ultra Open Earbuds vs soundcore AeroFit 2 Pro

A

Product A: Bose

Ultra Open Earbuds

64 of 166 known

Change Bose Ultra Open Earbuds

Compare the soundcore AeroFit 2 Pro with

Search earbuds

B

Product B: soundcore

AeroFit 2 Pro

81 of 166 known

Change soundcore AeroFit 2 Pro

Compare the Bose Ultra Open Earbuds with

Search earbuds

All 166 fields

Every value links to where we found it.

Only differences

ABose Ultra Open Earbuds

Bsoundcore AeroFit 2 Pro

General

7 of 8 differ

Series

Not available

AeroFit1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Listed in the AeroFit line of open-ear earbuds.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

438926, 926L, 926R, 881046-0010, 881046-0020, 881046-0030, 881046-0040, 881046-0050, 881046-0060, 881046-0070, 881046-0100, 881046-0200, 881046-0300, 881046-0400, 881046-0600, 881046-0700, 881046-0800, 881046-09002Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 4 and 6: case model 438926, left earbud 926L, right earbud 926R. The 881046 numbers are the SKUs in the product page offer data.

A3875, A3875Z11, A3875Z21, A3875ZQ1, A3875Z31, A3875G11, A3875G21, A3875GQ12Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026US store SKUs A3875Z11 Matte Black, A3875Z21 Gloss White, A3875ZQ1 Matte Purple and A3875Z31 Gloss Blue.3Maker product pageeu.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026EU store SKUs A3875G11, A3875G21 and A3875GQ1. The EU store has no blue SKU.9Regulatory filingsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000036614/en_US/000036614.pdfRead 15 October 2026EU and UK Declaration of Conformity: product soundcore AeroFit 2 Pro, model A3875.

GTIN / EAN

Not available

194644317744, 194644274528, 194644274535, 194644274542, 1946442745112Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026Barcodes in the US store product data: 194644317744, 194644274528, 194644274535 and 194644274542.3Maker product pageeu.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026EU black barcode 194644274511. The EU white and purple SKUs list the same barcodes as the US rows.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

15 February 20241Press releasebose.com/pressroom/bose-ultra-open-earbudsRead 10 October 2026February 15, 2024 launch announcement.

6 January 202611Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Maker blog dated 15 January 2026 about the CES 2026 Innovation Awards honoree. SoundGuys dates the CES announcement to 6 January 2026.14Reviewsoundguys.com/the-soundcore-aerofit-2-pro-are-open-earbuds-that-transform-into-anc-earbuds-150692Read 15 October 2026Article dated 6 January 2026: announced at CES 2026.

Status

Available3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bose.com US listing in stock on the access date.

Available1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Store product data shows all four colours available. The store page HTML showed a sold-out label when fetched, while the product data feed marked every variant available. The maker blog and reviews say it is on sale.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: available now in Matte Black, Matte Purple and Gloss White.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Bose Ultra Open Earbuds (2nd Gen)8Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 10 October 2026September 17, 2026 release: the Ultra Open Earbuds (2nd Gen) build on the original cuff design.

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$2991Press releasebose.com/pressroom/bose-ultra-open-earbudsRead 10 October 2026Press release: available starting today for $299. US price, sales tax not included.

$179.991Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026US store price 179.99 USD. Excludes sales tax.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: regular MSRP 179.99 USD. A launch promotion of 149.99 USD through 31 March 2026 is not an MSRP and is not stored.14Reviewsoundguys.com/the-soundcore-aerofit-2-pro-are-open-earbuds-that-transform-into-anc-earbuds-150692Read 15 October 2026Article: 179.99 USD, the same as the AeroFit 2 at launch.15Reviewtechradar.com/audio/earbuds-airpods/anker-soundcore-aerofit-2-pro-reviewRead 15 October 2026Review: 179.99 USD and 179.99 GBP.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€179.993Maker product pageeu.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026EU store price 179.99 EUR including VAT, no compare-at price. The German review price is the same. The EU store listing is dated April 2026, after the January launch, so the German review gives the launch evidence.16Reviewkopfhoerer.de/test/soundcore-aerofit-2-proRead 15 October 2026German review dated 21 January 2026 gives 179,99 EUR for the AeroFit 2 Pro.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US, CA, GB, DE, FR4Maker product pagebose.de/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bose Germany store offers the product in stock in EUR.5Maker product pagebose.co.uk/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bose UK store offers the product in stock in GBP.6Maker product pagebose.fr/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bose France store offers the product in stock in EUR.13Maker product pagebose.ca/en/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bose Canada store offers the product in stock in CAD.

US, EU1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026US store. The EU store lists the product too.3Maker product pageeu.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026EU store product data.

ColoursiThe maker's own colour names

Black, White Smoke, Lunar Blue, Diamond 60th Edition, Moonstone Blue, Chilled Lilac, Sunset Iridescent, Deep Plum, Carbon Blue, Midnight Violet, Moonlight Grey, Driftwood Sand, Desert Gold3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Color names from the page offer data. Black and White Smoke are the launch colors. The others are limited editions, some out of stock.

Matte Black, Gloss White, Matte Purple, Gloss Blue1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Colour selector: Matte Black, Gloss White, Matte Purple and Gloss Blue.2Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc.jsRead 15 October 2026Colour option values in the product data.

Segment

Not available

Sport1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Page: use during workouts or the commute. The maker blog calls it suited to jogging and cycling. Stored as sport like the AeroFit 2.

Design

1 of 4 differ

Form factoriIn-ear seals the ear canal with a tip. Semi-in-ear rests in the outer ear without a seal. Open-ear leaves the ear canal unobstructed.

Open-ear2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 14: the speaker rests on the inner surface of the ear and is not inserted into the ear canal.

Open-ear1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Page title and text: 2-in-1 earbuds that switch between open-ear and ANC modes. The product is dual-form. The open-ear form is stored because the store sells it as open-ear earbuds with ANC. In ANC form the maker calls it semi-in-ear.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Port double section: two wearing forms, Open-Ear and ANC. In Open-Ear form the earbuds rest on the ears and leave the ear canals clear.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: Open-Ear form keeps the drivers outside the ear canal. ANC form pivots the hooks inward to create a seal and the maker calls it Semi-In-Ear ANC.

Bud shapeiStem describes an extending control or microphone stalk. Stemless describes a compact body without a stalk.

Ear cuff2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 13: the speaker hooks in the ear and the barrel wraps behind the ear. Bose calls it cuff-shaped.

Ear hook6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Overview and wearing sections: an ear hook with five levels over the outer ear.

Use one bud aloneiWhich earbud can operate alone. This does not mean two earbuds can play from different sources.

Either bud2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 50 troubleshooting: if you are wearing only one earbud, place the other in the case. Either earbud is not specified further.

Either bud5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 26: single-ear use is supported. Dual-ear pairing, reset and custom EQ cannot be used with one earbud.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Controls and power sections: hold one earbud button for 3 seconds to power on a single earbud.

RGB lighting

Not available

Not available

Drivers and sound

9 of 17 differ

Drivers per budiAudio transducers in one earbud. Rows distinguish their type, acoustic role and published diameter. Do not count microphones.

ABose Ultra Open Earbuds

Not available

Bsoundcore AeroFit 2 Pro

Type	Diameter (mm)	Count per earbud
Dynamic	11.8	1

Source1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Page text: 11.8 mm composite drivers. The type and count come from the Anker Japan page and TechRadar.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Specifications: speaker 11.8 mm.10Maker product pageankerjapan.com/products/a3875Read 15 October 2026Page: 11.8 mm dynamic driver with an LCP diaphragm.15Reviewtechradar.com/audio/earbuds-airpods/anker-soundcore-aerofit-2-pro-reviewRead 15 October 2026Review: a custom-built 11.8 mm driver in each earbud. The review spec table also says 11.8 mm and one passage says 10.8 mm, which is read as a typo.

Driver typeiPublished transducer technology. High-excursion, composite and neodymium do not by themselves establish a driver type.

Not available

Dynamic10Maker product pageankerjapan.com/products/a3875Read 15 October 2026Page: 11.8 mm dynamic driver.

Driver sizeiLargest explicitly published circular driver diameter in one earbud. A rectangular driver width is not a diameter.

Not available

11.8mm=CalculatedFrom Drivers per bud

Drivers per budiTotal audio transducers in one earbud, summed from explicit driver quantities. A row with an unknown quantity makes the total unknown.

Not available

1=CalculatedFrom Drivers per bud

Diaphragm material

Not available

LCP10Maker product pageankerjapan.com/products/a3875Read 15 October 2026Page: LCP coated diaphragm.

Frequency responseiPublished acoustic frequency response of the earbuds. Codec transmission bandwidth alone does not qualify. Conditions belong in the source note.

Not available

Min20 HzMax40 kHz6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Specifications: 20 Hz to 20 kHz, and 40 kHz with LDAC enabled. The upper limit is stored with LDAC.

Impedance

Not available

16Ω6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Specifications: 16 ohm.

SensitivityiPublished acoustic sensitivity. The electrical reference and frequency must be stated in sensitivity_reference or the source note.

Not available

Not available

Sensitivity reference

Not available

Not available

Max sample rateiHighest supported audio sample rate under the codec and source-device conditions in the source note. This does not establish lossless playback.

Not available

Not available

Max bit depthiHighest supported audio bit depth under the codec and source-device conditions in the source note. Bluetooth version alone does not establish this.

Not available

Not available

Adaptive EQiAn inner mic tunes the sound to your ear in real time

Not available

Not available

Personalised soundiA profile from a hearing test or ear scan

Not available

Yes6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Hear ID section: a short in-app test of preferred music styles and sound types builds a profile. It is a preference test, not a hearing test.

Onboard EQ

Not available

Not available

Custom EQ bandsiNumber of independently adjustable custom equalizer frequency bands. Availability may require current firmware, an app or a compatible device.

32Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 19: bass, midrange and treble are adjusted in the Bose app.

86Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026EQ section: eight sliders in the custom equalizer. The guide also lists 22 EQ presets, which are not named, so no preset list is stored.

EQ presetsiNamed equalizer sound presets. Noise-control modes and spatial-audio modes are separate features.

Not available

Not available

Volume limit

Not available

Not available

Spatial audio

1 of 2 differ

Spatial audioiNamed spatial or surround audio processing supported with the source and platform conditions stated in the source note.

Bose Immersive Audio2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 21: Immersive Audio with Motion, Still and Off settings.

Spatial Audio6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Spatial audio section: Head Tracking with Music and Movie modes, or Fixed spatial sound.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: spatial audio with head tracking.

Head trackingiSpatial audio changes with head movement. Static spatial processing alone does not qualify. Compatible device or content requirements belong in the source note.

Yes2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 21: Motion keeps the sound in front of you as you move. Still keeps virtual speakers fixed and recenters a few seconds after movement stops.

Yes1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Page text: dynamic head tracking moves the sound around you.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Spatial audio section: surround sound that follows head movement.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: spatial audio with head tracking.

Noise cancelling

3 of 11 differ

Active noise cancelling

No3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Technical specifications: Noise Cancelling No.

Yes6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026ANC section: ANC and Normal modes in the soundcore app, or hold an earbud for 2 seconds. It works only when both earbuds are in ANC form.

ANC typeiFeedforward uses exterior microphones. Feedback uses interior microphones. Hybrid uses both. Adaptive control is separate from microphone placement.

Not available

Not available

ANC microphones in both earbudsiPhysical microphones used by ANC across the pair. A shared call and ANC microphone counts once. Case microphones and vibration sensors are excluded.

Not available

613Maker product pagede.soundcore.com/blogs/earbuds/soundcore-aerofit-2-pro-vs-powerbeats-pro-2Read 15 October 2026German maker blog: a precise acoustic system with six ambient noise sensors. SoundGuys calls it a six-microphone array. The split between earbuds is not stated.14Reviewsoundguys.com/the-soundcore-aerofit-2-pro-are-open-earbuds-that-transform-into-anc-earbuds-150692Read 15 October 2026Article: in sealed earbud mode a six-microphone array with Adaptive ANC 3.0.

Adaptive ANCiANC strength or calibration adjusts automatically to noise, fit or ear acoustics. The source note states the adjustment conditions.

Not available

Yes6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026ANC section: the app ANC mode adapts to your ears and your environment. Tips text: adaptive noise cancellation turns on in ANC form.12Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-vs-aerofit-2-proRead 15 October 2026Blog: adaptive ANC using four integrated microphones and AI algorithms.14Reviewsoundguys.com/the-soundcore-aerofit-2-pro-are-open-earbuds-that-transform-into-anc-earbuds-150692Read 15 October 2026Article: Adaptive ANC 3.0 adjusts noise canceling up to 180 times per second.

ANC levelsiNumber of selectable ANC strength levels. Excludes ANC off, transparency and activity profiles unless they explicitly set distinct strength levels.

Not available

Not available

ANC attenuation (claimed)iManufacturer maximum claimed noise attenuation. Frequency and measurement conditions belong in the source note. This is not reviewer-measured overall attenuation.

Not available

Not available

Transparency mode

Not available

Not available

Adjustable transparency

Not available

Not available

Automatic ANC and transparency blendiAutomatically blends active cancellation with ambient sound. Automatic activity-based switching between separate modes alone does not qualify.

Not available

Not available

Conversation detection

Not available

Not available

Wind noise reductioniA documented physical design or processing feature for reducing wind noise. The source note distinguishes mesh or shape changes from selectable processing.

Not available

Not available

Measured

4 of 23 differ

Frequency response notes (measured)iMeasured by a reviewer, not claimed by the maker

Measured response is far from the SoundGuys headphone preference curve. It lines up in the mid-range, has no bass response and has a sharp spike in the upper mid-range.10Measurementsoundguys.com/bose-ultra-open-earbuds-review-113271Read 10 October 2026Objective Measurements section. Firmware 1.10.4, Bose Music app 9.1.8, default settings. No numeric deviation stored.

Not available

Bass amount (measured)iDeviation from the review source target in the bass range. Positive means more bass. Target, test method and settings belong in the source note.

Not available

Not available

Treble amount (measured)iDeviation from the review source target in the treble range. Positive means more treble. Values from different targets may not be directly comparable.

Not available

Not available

Deviation from target (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Consistency between fittings (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Harmonic distortion (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Sound leakage (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Noise isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Noise isolation, best (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Passive isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Call quality notes (measured)iMeasured by a reviewer, not claimed by the maker

Voices are clear in ideal conditions but the microphone is rated subpar. Wind noise is not rejected in the simulated outdoor test.10Measurementsoundguys.com/bose-ultra-open-earbuds-review-113271Read 10 October 2026Microphone demos in ideal, office, street, windy and reverberant conditions. Reviewer rates the microphone subpar.

Not available

Mic low-frequency extension (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic high-frequency extension (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic speech-to-noise ratio (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Latency (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Bluetooth latency, worst (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

2.4 GHz latency, worst (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Latency in game mode (measured)iThe best case the buds can reach. Measured by a reviewer

Not available

Not available

Battery life (measured)iReviewer-tested operation from one full charge of the earbuds. Excludes case recharges. ANC, codec, connection, volume and tested edition belong in the row or source note.

ABose Ultra Open Earbuds

ANC	Hours (h)
No	8.88

Source10Measurementsoundguys.com/bose-ultra-open-earbuds-review-113271Read 10 October 2026SoundGuys standardized battery test: 8 hours 53 minutes. Firmware 1.10.4, app 9.1.8. Earbuds only, one charge. Codec and volume are not stated. No ANC.

Bsoundcore AeroFit 2 Pro

Not available

Longest tested use per chargeiHighest earbuds-only duration among stored reviewer tests. Modes and settings may differ between tests and products.

8.88h=CalculatedFrom Battery life (measured)

Not available

Battery life with case (measured)iReviewer-tested total including earbuds and case recharges. Do not calculate this by multiplying one-charge runtime by claimed recharge count.

Not available

Not available

Full charge time (measured)iBuds in the case, 0 to 100 %. Measured by a reviewer

Not available

Not available

Weight per bud (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Microphones and calls

2 of 7 differ

Voice microphones in both earbudsiPhysical call and beamforming microphones across the pair. Excludes case microphones and vibration sensors. Shared ANC microphones can also count here when used for calls.

Not available

41Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Page text: 4 mics with AI-boosted call technology. The split between earbuds is not stated.12Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-vs-aerofit-2-proRead 15 October 2026Blog: four integrated microphones with AI algorithms for adaptive ANC. The German blog says four microphones for calls.13Maker product pagede.soundcore.com/blogs/earbuds/soundcore-aerofit-2-pro-vs-powerbeats-pro-2Read 15 October 2026German maker blog: four microphones with AI noise reduction for calls.

All microphones in both earbudsiEvery physical microphone across the pair, including call and ANC microphones. Shared microphones count once. Excludes the charging case and voice vibration sensors.

Not available

Not available

Bone conduction voice sensoriA dedicated bone or jaw conduction sensor for detecting speech vibrations. A microphone or speech-detecting accelerometer alone does not prove this architecture.

Not available

Not available

Mic noise reduction

Not available

AI1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026Page text: AI-boosted call technology.

Call audio bandwidthiHighest supported call-audio bandwidth. Compatible phone, operating system, call app or network requirements belong in the source note.

Not available

Not available

Mic mute controliAn earbud control that mutes the microphone during calls. Includes touch or pressure gestures and physical buttons. Phone/app-only controls do not qualify.

Not available

Not available

SidetoneiHear your own voice in calls

Not available

Not available

Connectivity

6 of 18 differ

Chip

Not available

Not available

Connections

Bluetooth3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Wireless Connectivity row lists Bluetooth only. The USB cable is for charging.

Bluetooth6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Power on and pairing section and specifications: Bluetooth 6.1 only.

Bluetooth

5.31Press releasebose.com/pressroom/bose-ultra-open-earbudsRead 10 October 2026Press release: Bluetooth 5.3 compatible. SoundGuys and What Hi-Fi also list Bluetooth 5.3.

6.14Maker product pageservice.soundcore.com/product-description/a08e2000006OrpTAASRead 15 October 2026Spec list: Bluetooth version 6.1.5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 1: Bluetooth 6.1.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Specifications: Bluetooth 6.1.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: Bluetooth 6.1 with multipoint.

Bluetooth codecs

SBC, AAC, aptX Adaptive2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 39: with a Snapdragon Sound certified device the earbuds stream with aptX Adaptive. SBC and AAC come from the maker product page.

SBC, AAC, LDAC4Maker product pageservice.soundcore.com/product-description/a08e2000006OrpTAASRead 15 October 2026Spec list: supported Bluetooth codecs LDAC, SBC, AAC.5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 2: SBC, AAC and LDAC.16Reviewkopfhoerer.de/test/soundcore-aerofit-2-proRead 15 October 2026Review: SBC and AAC plus LDAC as the Hi-Res codec.

Bluetooth profiles

A2DP, HFP3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Wireless Connectivity row lists A2DP Bluetooth Audio Streaming, Bluetooth Low Energy and HFP Bluetooth.

Not available

LE Audio

Not available

Not available

Auracast

Not available

Not available

MultipointiConcurrent Bluetooth connections to multiple source devices. Pairing memory and switching through a manufacturer account alone do not qualify.

Yes2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 33: connected to up to two devices at a time. Audio plays from one device at a time.

Yes5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 21: Dual Connections connect two devices.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Dual connection section: connect two Bluetooth devices at the same time. Dual connections are on by default.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: Bluetooth 6.1 with multipoint connection.

Multipoint devicesiMaximum source devices concurrently connected by Bluetooth, not the number remembered in pairing history.

22Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 33 and 36: up to two devices connected at once.

25Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 21 and 22: two devices at once. A third device needs one removed first.12Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-vs-aerofit-2-proRead 15 October 2026Blog: connect to two devices simultaneously.16Reviewkopfhoerer.de/test/soundcore-aerofit-2-proRead 15 October 2026Review: up to two sources at the same time.

Multipoint with LDACiMany buds turn multipoint off on LDAC

Not available

Not available

Paired devices rememberediMaximum remembered Bluetooth source pairings. This is separate from simultaneous multipoint connections.

62Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 33: up to six devices in the earbud device list.

85Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 12: up to 8 Bluetooth devices remembered.

Automatic switching between own devicesiThrough the maker's account

Not available

Not available

Fast pairing

Google Fast Pair1Press releasebose.com/pressroom/bose-ultra-open-earbudsRead 10 October 2026Press release: Google Fast Pair for Android pairing.

Not available

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

9m2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed pages 35 and 40: range of 30 ft or 9 m.

10m5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 18: 33 ft or 10 m.

Wireless receiveri2.4 GHz dongle

Not available

Not available

Receiver connector

Not available

Not available

Simultaneous 2.4 GHz and Bluetooth audioiBoth connection types can play audio together. Quick switching between independent modes does not qualify.

Not available

Not available

Latency

3 of 3 differ

Low latency mode

Not available

Yes15Reviewtechradar.com/audio/earbuds-airpods/anker-soundcore-aerofit-2-pro-reviewRead 15 October 2026Review: the app brings a low-latency mode and a spatial audio mode.16Reviewkopfhoerer.de/test/soundcore-aerofit-2-proRead 15 October 2026Review: the app has a gaming mode that reduces latency.

Claimed latency

ABose Ultra Open Earbuds

Not available

Bsoundcore AeroFit 2 Pro

Connection	Latency (ms)
Bluetooth	200

Source5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 31: about 200 ms. The connection is Bluetooth. No mode is stated.

Lowest claimed latency

Not available

200ms=CalculatedFrom Claimed latency

Compatibility

1 of 4 differ

PlatformsiPlatforms with documented audio support. App availability and advanced features can be more limited. Edition-specific support is listed in variants.

Android, iOS9Reviewsoundguys.com/bose-ultra-open-earbuds-review-113271Read 10 October 2026FAQ: the earbuds work with iPhone. Android support is shown by Google Fast Pair in the owner's guide.

Android, iOS6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Pairing and volume sections give Android and iOS steps, and the LDAC section names Android 8.0 or later. FAQ 7 names the App Store. A support article about a MacBook exists, but its text could not be read, so macOS is not stored.

Connection per platformiDocumented audio connection for each platform. USB-C phone routes require a compatible port. Platform edition and microphone restrictions belong in source notes or feature requirements.

Not available

Not available

Features that need a specific deviceiDevice, operating system, firmware, codec, content, account or region requirements for a named feature.

ABose Ultra Open Earbuds

Feature	Needs
Google Fast Pair	Android 6.0 or higher with Bluetooth and Location enabled.
Snapdragon Sound and aptX Adaptive	A Snapdragon Sound certified device, such as a compatible Android device.
Personal Surround	A compatible Bose Smart Soundbar, currently Bose Smart Ultra Soundbar and Bose Smart Soundbar.

Source2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 38 for Fast Pair, page 39 for Snapdragon Sound, page 42 for Personal Surround.

Bsoundcore AeroFit 2 Pro

Feature	Needs
LDAC	Android 8.0 or later. Turn it on in the soundcore app under Settings, Sound Mode, Preferred audio quality. It shortens playback time.
Active noise cancelling	Works only when both earbuds are in ANC form. It cannot be turned on in Open-Ear form. Automatic switching is on by default and Smart Toggle in the app turns it off.
Hear ID	Set up in the soundcore app under Sound Effects, EQ, Preference. The Open-Ear form does not support the Hear ID test, so keep the earbuds in ANC form.
AI translation	The phone must be connected to the soundcore app, version 3.8.7 or higher, and Dual Connections must be turned off.
Anka AI assistant	Latest soundcore app with the earbuds connected to the app. The assistant cannot open or control other apps.

Source5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 7: the AI translation feature needs soundcore app version 3.8.7 or higher.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026ANC, Hear ID, AI assistant, AI translation and LDAC sections.

Official licence

Not available

Not available

Battery and charging

10 of 13 differ

Battery per budiBattery cell capacity of one earbud. The source note states typical or rated capacity. Charging input current is not capacity.

Not available

60mAh5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 3: 60 mAh for each earbud. Typical or rated basis is not stated. The safety sheet gives a nominal battery voltage of 3.85 V. A German comparison page lists a different figure for the earbuds, so the FAQ is used.

User-replaceable earbud batteryiThe maker documents normal battery replacement by the user with its approved procedure and tools. Service or recycling disassembly does not count.

No2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 5: do not attempt to remove the lithium-ion battery. Contact a Bose retailer or qualified professional.

No8Maker spec sheet (PDF)lp.ankerjapan.com/hubfs/aoos/manual/A3875Safety.pdfRead 15 October 2026Safety sheet: the product contains non-replaceable lithium ion batteries, nominal 3.85 V, and the user should not replace them.

Claimed battery lifeiManufacturer maximum runtime under the stated mode, codec and spatial processing state. Name the spatial or immersive processing mode and other conditions in source notes. Omit unspecified settings. with_case false means one charge of the earbuds. true means earbuds plus case recharges.

ABose Ultra Open Earbuds

Mode	Spatial audio	Includes case recharges	Hours (h)
ANC off	No	No	7.5
ANC off	Yes	No	4.5
ANC off	No	Yes	27
ANC off	Yes	Yes	16.5

Source2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 29. Bose test January 2024: A2DP, IEC 60268-1 pink noise, 75 dBA, 3-band EQ at zero. Up to 7.5 h with Immersive Audio and Auto Volume off. Up to 4.5 h with either on, which is the stored spatial row. Up to 3.5 h with both on. Total with the case: 27 h, 16.5 h with either on, 12 h with both on. Codec not stated. No ANC.

Bsoundcore AeroFit 2 Pro

Mode	Codec	Includes case recharges	Hours (h)
ANC off	Not available	No	7
ANC off	Not available	Yes	34
ANC on	Not available	No	5
ANC on	Not available	Yes	24
ANC on	LDAC	No	3
Call	Not available	No	4
Call	Not available	Yes	20

Source5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 9, 10 and 11, with music at 50 percent volume and calls at 60 percent volume. Open-Ear form 7 hours and 34 hours with the case. ANC form 5 hours and 24 hours with the case. With LDAC the ANC form gives about 3 hours. The FAQ also gives 6 hours with LDAC in the Open-Ear form, but the CES blog says LDAC cuts about 3 hours in that form, so that row is not stored. Calls are about 4 hours in both forms. Open-Ear form is stored as ANC off because ANC cannot be turned on there. ANC form is stored as ANC on.10Maker product pageankerjapan.com/products/a3875Read 15 October 2026FAQ on the page: ANC off 7 hours and 34 hours with the case in Open-Ear form, 5 hours and 24 hours in ANC form, calls about 4 hours.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog footnote, internal lab testing: Open-Ear form 7 hours and 34 hours with the case, ANC form 5 hours and 24 hours with the case. Calls up to 4 hours in Open-Ear form with 20 hours with the case. In ANC form calls are up to 4 hours with ANC on and 5 hours with ANC off, about 20 and 25 hours with the case. The call mode cannot split ANC on and off, so the 4 and 20 hour rows are stored. LDAC cuts about 3 hours in Open-Ear form and 2 hours in ANC form.

Longest claimed use per chargeiHighest earbuds-only runtime among all stored modes. This can be ANC off, Hearing Aid, heart-rate or call use. Read the battery table and source conditions.

7.5h=CalculatedFrom Claimed battery life

7h=CalculatedFrom Claimed battery life

Playback per charge with ANC (claimed)iHighest claimed earbuds-only playback with ANC enabled. Codec and spatial-audio conditions belong in the source note.

Not available

5h=CalculatedFrom Claimed battery life

Playback per charge without ANC (claimed)iHighest claimed earbuds-only playback with ANC disabled. Codec and volume conditions belong in the source note.

7.5h=CalculatedFrom Claimed battery life

7h=CalculatedFrom Claimed battery life

Total with case (claimed)iHighest claimed runtime including the initial earbud charge and all case recharges. It is not the case recharge runtime alone.

27h=CalculatedFrom Claimed battery life

34h=CalculatedFrom Claimed battery life

Total with case and ANC (claimed)iClaimed total playback with ANC, including the initial earbud charge and case recharges.

Not available

24h=CalculatedFrom Claimed battery life

Talk time (claimed)

Not available

4h=CalculatedFrom Claimed battery life

Full charge time, budsiTime to charge discharged earbuds to full in the case. Excludes charging the case itself or a combined buds-and-case result.

60min2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 29: earbuds up to 1 hour. Bose test: depleted earbuds in a fully charged case.

60min5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 3: a full earbud charge takes about 1 hour. The French and Japanese spec tables agree.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Specifications table: earbuds 1 hour.

Charging guidanceiPublished charging guidance or estimates that do not separate earbuds and case. Preserve the maker’s component scope and limits. Do not assign an unspecified or combined estimate to a component-specific numeric field.

Not available

The maker documents disagree on the charging times that include the case. The French guide gives 1.7 hours for the case and earbuds by cable and 2.6 hours wirelessly. The Japanese guide gives about 2 hours by cable and about 3 hours wirelessly in its text and 3.5 hours wirelessly in its spec table. The FAQ gives about 2 hours for the case and about 4 hours wirelessly. The case input is 5 V 0.8 A. The FAQ says a fully charged case recharges the earbuds 3 times.5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 4, 14 and 8.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Charging section and specifications: case wired 0.7 hour, case and earbuds 1.7 hours wired and 2.6 hours wireless. Input 5 V 0.8 A.7Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3875Manual.pdfRead 15 October 2026Japanese guide: case full charge about 2 hours by cable and about 3 hours wirelessly in the text. Its spec table gives earbuds and case about 2 hours by cable and about 3.5 hours wirelessly.

Quick charge timeiCharge duration corresponding to quick_charge_playback_h. Source note states earbuds-only or case-inclusive charging and playback settings.

10min2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 29: a 10-minute charge with the case closed.

10min5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 16: a 10 minute recharge gives up to 3.5 hours of playback. The charging case does not support this feature.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: 10 minutes of charging provides up to 3.5 hours of playback.

Earbud playback after quick chargeiEarbuds-only runtime after quick_charge_min of charging. A claimed case-inclusive total does not qualify. ANC, codec and volume conditions belong in the source note.

2h2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 29: up to 2 hours of earbud playback after 10 minutes. Immersive Audio and Auto Volume off, 75 dBA.

3.5h5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 16: up to 3.5 hours of playback after 10 minutes. This is earbud playback. Form, volume and ANC are not stated.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: up to 3.5 hours of playback after 10 minutes of charging.

Charging case

4 of 10 differ

Case batteryiCharging-case battery cell capacity. The source note distinguishes typical, rated and output capacity. USB output capacity alone does not qualify.

Not available

750mAh5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 4: 750 mAh for the charging case. The user guides list 750 mAh in the spec table without naming the part.

User-replaceable case batteryiThe maker documents normal case battery replacement by the user with its approved procedure and tools. Service or recycling disassembly does not count.

No2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 5 gives the same instruction for the product. Bose sells the charging case as a replacement part.

No8Maker spec sheet (PDF)lp.ankerjapan.com/hubfs/aoos/manual/A3875Safety.pdfRead 15 October 2026Same sentence covers the product, including the charging case.

Case charging port

USB-C2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 27: USB-C port on the bottom of the charging case.

USB-C6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Overview: USB-C charging port on the case.

Case full charge timeiBy cable, 0 to 100 %. A time the maker gives with the earbuds inside the case counts, and the source note says so.

180min2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 29: charging case up to 3 hours. The connection is the USB cable.

Not available

Wireless charging

No7Maker product pagebose.com/p/accessories/bose-ultra-open-earbuds-wireless-charging-case-cover/CMWB-FULT_WLSCH-COVERCASE.htmlRead 10 October 2026Bose sells a Wireless Charging Case Cover as an upgrade to wireless charging. The earbuds and case as sold have no wireless charging. The 2nd gen press release also says its case is the one that now supports wireless charging.

Yes5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 6 and 13: the charging case supports wireless charging.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Charging section: place the case on a wireless charger for wireless charging.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: wireless charging supported.15Reviewtechradar.com/audio/earbuds-airpods/anker-soundcore-aerofit-2-pro-reviewRead 15 October 2026Review: the case facilitates wireless charging.

Wireless standardsiDocumented case charging standards or supported chargers. Magnetic alignment alone does not establish Qi2 certification.

Not available

Qi5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 6: wireless charging supports the Qi protocol. The FAQ also gives a maximum power output of 3 W. That figure is not stored because the safety sheet gives a different 0.005 to 5 W charger range and the field counts case input only.

Wireless charging poweriHighest wireless charging input the maker states for the case. The output of a charging pad does not count.

Not available

Not available

Speaker in caseiAn audio speaker physically in the charging case, for locating or status sounds. A microphone in the case is separate.

Not available

Not available

Screen on case

Not available

Not available

Case works as audio transmitteriCase relays external source audio through USB or an analog audio input. A case microphone for recording or calls does not qualify.

Not available

Not available

Controls

2 of 5 differ

ControlsiPressure is a force sensor that does not move, such as a stem you squeeze. Button is a key that moves when pressed.

Button2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 17: one button on each earbud barrel.

Button6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Overview lists an earbud button. Controls table uses presses and holds.15Reviewtechradar.com/audio/earbuds-airpods/anker-soundcore-aerofit-2-pro-reviewRead 15 October 2026Review: each earbud has a physical button with a click, not a touch area.16Reviewkopfhoerer.de/test/soundcore-aerofit-2-proRead 15 October 2026Review: controlled through an integrated button on the back of each earbud.

Earbud volume controliHow earbud controls adjust volume, including a voice command if supported. Phone or app controls alone do not qualify.

Buttons2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 18: double-press and hold the right button for up, the left button for down.

Buttons6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Controls table: one press on the right earbud raises volume and one press on the left lowers it.

Gestures

Press: play or pause, answer a call, Double-press: next track, end or decline a call, Triple-press: previous track, Press and hold: shortcut, by default cycle through modes, Double-press and hold right earbud: volume up, Double-press and hold left earbud: volume down2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed pages 17 to 20.

Press twice (left or right): play or pause, Press once (right): volume up, Press once (left): volume down, Press once (left or right): answer a call, Hold for 2 seconds (left or right): reject an incoming call or end a call, Hold for 2 seconds (left or right): turn ANC on or off, Hold for 3 seconds (left and right): power off, Hold for 3 seconds on one earbud: power on that earbud6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Controls table with default button settings. L is left and R is right.

Remappable controls

Yes2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 20: the shortcut on each earbud can be changed in the Bose app.

Yes6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Controls section: touch and button controls can be customised in the app for volume, skip track, play or pause, and the voice assistant.

Voice assistant

Device voice control2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 25: a shortcut opens the voice control of the connected device. The earbud microphones act as an extension of the device microphone.

Anka6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Smart assistant section: Anka, started by saying Hey Anka.

Sensors and health

1 of 9 differ

In-ear detection

No11Reviewwhathifi.com/reviews/bose-ultra-open-earbudsRead 10 October 2026Reviewer states there is no auto-pause when you take an earbud out.12Reviewstuff.tv/review/bose-ultra-open-earbuds-reviewRead 10 October 2026Reviewer states there is no wear detection. Music only stops when the buds go back in the charging case.

No5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 15: the AeroFit 2 Pro does not feature wearing detection.

Sensors

IMU (Inertial Measurement Unit)1Press releasebose.com/pressroom/bose-ultra-open-earbudsRead 10 October 2026Press release: onboard IMU (Inertial Measurement Unit) drives Bose Immersive Audio.

Sensors that detect Open-Ear or ANC form6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Wearing section: built-in sensors detect which form is in use from whether the earbuds cover the ear canals. SoundGuys says two sensors in each earbud.14Reviewsoundguys.com/the-soundcore-aerofit-2-pro-are-open-earbuds-that-transform-into-anc-earbuds-150692Read 15 October 2026Article: two sensors in each earbud detect Open-Ear or sealed mode and recalibrate the EQ.

Heart rate sensor

Not available

Not available

Skin temperature sensingiA documented skin temperature sensor. This is separate from the operating temperature range or a heart-rate sensor.

Not available

Not available

Hearing aid featureiAmplification for mild to moderate hearing loss

Not available

Not available

Medical clearances

Not available

Not available

Hearing testiA documented hearing assessment feature, including consumer sound-personalization tests. Medical diagnostic clearance must be stated separately.

Not available

Not available

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Not available

Not available

Fit and durability

3 of 7 differ

Ear tips includediTip sizes supplied with the product, including the pair fitted to the earbuds. Do not list separately sold sizes as included.

Not available

Not available

Ear tip materials

Not available

Not available

StabilisersiPhysical stabilizing fittings or structures. Stability bands are separate from fins, wings and ear hooks.

Not available

Ear hook6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Wearing sections: an ear hook that slides between five levels.

Ear tip fit test

Not available

Not available

Dust and water rating, buds

IPX42Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 43: earbuds IPX4.

IP554Maker product pageservice.soundcore.com/product-description/a08e2000006OrpTAASRead 15 October 2026Spec list: waterproof rating for the earbuds IP55.5Maker product pageservice.soundcore.com/article-description/soundcore-AeroFit-2-Pro-FAQRead 15 October 2026FAQ 5: earbuds IP55. The charging case is not water resistant, so no case rating is stored.6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Specifications: IP55.11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: rated IP55 for water and dust resistance.

Dust and water rating, case

IPX12Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 43: charging case IPX1.

Not available

Water resistance depth

Not available

Not available

Software

2 of 6 differ

Companion app

Bose app2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 12.

soundcore6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026ANC, Hear ID and EQ sections refer to the soundcore app.

App platforms

Android, iOS2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 6 trademark notice names the Apple App Store and Google Play. The maker product page says the app is on Google Play and the Apple Store.

Android, iOS6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Smart assistant section: Android users adjust system settings so the app runs in the background. FAQ 7 names the App Store for iOS.

User firmware updates

Yes2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 45: earbuds update automatically through the Bose app when an update is available.

Yes6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026Firmware update section: the app announces new firmware and updates the earbuds.

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Yes6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026AI translation section: real-time and face-to-face translation in 100 languages.

Dimensions and weight

4 of 4 differ

Weight per budiMass of one earbud. Tip size and approximate values belong in the source note. Do not store pair or case-inclusive mass.

6.35g(0.2 oz)3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bud Single 0.014 lb. Converted with 453.59237 g per lb to 6.35 g. The pound figure is rounded, so the true mass may differ a little. SoundGuys lists 6 g.

10.5g(0.4 oz)10Maker product pageankerjapan.com/products/a3875Read 15 October 2026Spec table: about 10.5 g per earbud and about 109 g for the charging case with the earbuds. TechRadar gives 10.4 g in its preview and 11 g in its review. The case-only weight is not stated by the maker, so it is not stored.

Bud dimensionsiDimensions of one earbud on the explicitly identified width, height and depth axes. An unlabeled tuple cannot establish those axes.

Width17Height18.5Depth27.2mm(0.7 × 0.7 × 1.1 in)4Maker product pagebose.de/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Einzelner Earbud 1.85 cm H x 1.7 cm W x 2.72 cm D. Maker-labeled axes in cm, stored in mm. The US page gives the same size in inches.

Not available

Case weightiCharging case mass excluding earbuds. Case-inclusive product mass does not qualify unless the source explicitly gives the empty-case figure.

44g(1.6 oz)3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Case 0.097 lb, converted to 44.0 g. Listed apart from the single bud, so read as the empty case. SoundGuys lists 57 g, which is about the case plus two earbuds.

Not available

Case dimensionsiCharging-case width, height and depth on explicitly identified source axes. Report conflicting axis labels rather than reorder a tuple by appearance.

Width65Height41.9Depth26.4mm(2.6 × 1.6 × 1 in)4Maker product pagebose.de/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Etui 4.19 cm H x 6.5 cm W x 2.64 cm D. Maker-labeled axes. SoundGuys lists 65 x 27 x 49 mm, which differs on the height axis.

Not available

Certifications

2 of 3 differ

Hi-Res AudioiThe Japan Audio Society logos. Hi-Res Audio Wireless is also written Hi-Res Wireless Audio.

Not available

Hi-Res Audio Wireless11Maker product pageus.soundcore.com/blogs/open-ear/aerofit-2-pro-ces-2026-awardRead 15 October 2026Blog: Hi-Res Audio certified with LDAC support on Android. The blog does not name the wireless logo. TechRadar names Hi-Res Audio Wireless, which is stored.15Reviewtechradar.com/audio/earbuds-airpods/anker-soundcore-aerofit-2-pro-reviewRead 15 October 2026Review: Hi-Res Audio Wireless certification and LDAC support.

Communication certifications

Not available

Not available

FCC IDs

A94926L, A94926R2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 4: FCC ID A94926L / A94926R.

Not available

Other certifications

Snapdragon Sound2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 39: Snapdragon Sound technology.

CE, UKCA9Regulatory filingsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000036614/en_US/000036614.pdfRead 15 October 2026Declaration lists Directive 2014/53/EU for the EU and UK. CE and UKCA marks follow from the declaration.

In the box

2 of 2 differ

In the box

2 Bose Ultra Open Earbuds, Charging case, USB-C (A to C) cable, Safety sheet2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Printed page 11: earbuds, charging case, USB Type-C to USB-A cable. The maker page also lists a safety sheet.

Earbuds, Charging case, USB-C and USB-A cable, Quick start guide10Maker product pageankerjapan.com/products/a3875Read 15 October 2026Spec table package list for Japan: the unit, charging case, USB-C and USB-A cable and quick start guide. The Japan model numbers A3875N11, N21, N31 and NQ1 are not stored.

Cables included

ABose Ultra Open Earbuds

Type	Length (m)	Count
USB Type-C to USB-A cable	0.3	1

Source5Maker product pagebose.co.uk/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026In the box: USB-C (A to C) cable (30 cm). The US page gives 12 inches.

Bsoundcore AeroFit 2 Pro

Type
USB-C and USB-A cable

Source10Maker product pageankerjapan.com/products/a3875Read 15 October 2026Package list: one USB-C and USB-A cable. The length is not stated.

Links

Not compared

Product page

www.bose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.html3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Bose US product page.

us.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-anc1Maker product pageus.soundcore.com/products/a3875-aerofit-2-pro-open-ear-earbuds-with-ancRead 15 October 2026

Spec sheet

Not available

service.soundcore.com/product-description/a08e2000006OrpTAAS4Maker product pageservice.soundcore.com/product-description/a08e2000006OrpTAASRead 15 October 2026Soundcore support product page for the AeroFit 2 Pro. It lists a short spec list, the user guides and the EU declaration.

Manual

assets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdf2Owner's manualassets.bosecreative.com/m/65e13aaa016a23ac/original/889371_OG_ULT-HEADPHONEOPN_en.pdfRead 10 October 2026Owner's guide 889371, English, copyright 2026. It covers Bose Ultra Open Earbuds with case model 438926.

salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdf6Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000038533/en_US/000038533.pdfRead 15 October 2026French user guide A3875 from the Soundcore knowledge base. No English PDF was found. The English guide is a support article that has no readable text.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

1 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year3Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds/ULT-HEADPHONEOPN.htmlRead 10 October 2026Page says Bose products come with a 1-year limited warranty from the date of purchase. US page.

1.5years8Maker spec sheet (PDF)lp.ankerjapan.com/hubfs/aoos/manual/A3875Safety.pdfRead 15 October 2026Safety sheet: 18-month limited warranty, with 12 months for India.

Both are also in the API. Back to all earbuds.