Earbuds / Compare

Bose Ultra Open Earbuds vs soundcore V20i

A

Product A: Bose

Ultra Open Earbuds

64 of 166 known

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B

Product B: soundcore

V20i

60 of 166 known

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Every value links to where we found it.

Only differences

ABose Ultra Open Earbuds

Bsoundcore V20i

General

4 of 8 differ

Series

Not available

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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.

A3876, A3876Z11, A3876Z21, A3876Z31, A3876G11, A3876G21, A3876G313Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876QSG.pdfRead 15 October 2026Guide prints Model A3876 / A3876L / A3876R. Colour codes Z11, Z21 and Z31 come from the US store and Anker Japan. G11, G21 and G31 come from the German Soundcore store.

GTIN / EAN

Not available

194644060466, 194644060459, 1946440604424Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Store barcodes: Black A3876Z11 194644060466, White A3876Z21 194644060459, Blue A3876Z31 194644060442. The German store lists the same barcodes for A3876G11, A3876G21 and A3876G31.

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.

Not available

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.

Available4Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026

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

Not available

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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.

$49.997Press articlekotaku.com/forget-shokz-anker-clears-out-soundcore-v20i-open-ear-headphones-at-nearly-50-off-2000702161Read 15 October 2026Kotaku says the V20i debuted in 2024 at just $50. The maker US store regular price is 49.99 USD and has not changed. No maker launch announcement was found, so the exact launch label is read from those two.

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

Not available

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, DE, JP5Maker product pagede.soundcore.com/products/a3876-v20i-open-ear-earbuds.jsRead 15 October 2026Maker stores for the US and Germany and a maker page for Japan.

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.

Black, White, Blue4Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026US store option names are Black, White and BIue. The last is a typo for Blue. Anker Japan calls the same A3876Z31 colour Navy.

Segment

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Design

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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 pageankerjapan.com/products/a3876Read 15 October 2026

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 hook1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Page text describes ear hooks with four adjustable angle positions that hold the earbuds in place.

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 bud2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Manual has a mono mode for single-earbud use with a double tap for play and pause. It does not name a primary earbud.

RGB lighting

Not available

Yes1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Page text describes customisable colourful lights on the earbuds.

Drivers and sound

8 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 V20i

Type	Diameter (mm)	Count per earbud
Dynamic	16	1

Source1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Table row reads 16mm dynamic. One driver per earbud. The acoustic role is not published.

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

Not available

Dynamic1Maker product pageankerjapan.com/products/a3876Read 15 October 2026

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

Not available

16mm=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

Titanium-coated dome4Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Maker text: 16mm drivers with titanium-coated domes and BassUp technology.

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

Not available

Min20 HzMax20 kHz2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Specification table row reads 20 to 20 kHz. No codec or test condition is given.

Impedance

Not available

16Ω2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Specification table row reads 16 ohm. One retailer listing gives 11 ohm.

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

Not available

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Sensitivity reference

Not available

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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

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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

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

Not available

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Personalised soundiA profile from a hearing test or ear scan

Not available

Not available

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.

Not available

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

Not available

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Volume limit

Not available

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Spatial audio

2 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.

Not available

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.

Not available

Noise cancelling

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Active noise cancelling

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

No5Maker product pagede.soundcore.com/products/a3876-v20i-open-ear-earbuds.jsRead 15 October 2026German store text says the V20i open-ear earbuds have no active noise cancelling.

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

Not available

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

Not available

Not available

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

Not available

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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

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Adjustable transparency

Not available

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

Not available

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Conversation detection

Not available

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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

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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

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

Not available

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

Not available

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

Not available

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

Not available

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

Not available

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

Not available

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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

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

Not available

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

Not available

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

Not available

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

Not available

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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 V20i

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

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

Not available

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Microphones and calls

3 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

44Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Maker text: four mics with an AI algorithm for clear 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

44Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Maker lists four microphones. The split between earbuds is not published. No ANC microphones because there is no ANC.

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

AI4Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Maker text calls the call algorithm AI enhancement. Anker Japan calls it AI noise reduction.

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.

Bluetooth2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Pairing is by Bluetooth. The product has no 2.4 GHz receiver or wired input.

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.

5.41Maker product pageankerjapan.com/products/a3876Read 15 October 2026

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, AAC1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Table row for supported codecs reads SBC / AAC. A retailer listing that names LDAC is not supported by the maker.

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.

Yes2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Manual explains connecting two devices at the same time. It must be turned on in the Soundcore app first.

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.

22Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026

Multipoint with LDACiMany buds turn multipoint off on LDAC

Not available

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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.

Not available

Automatic switching between own devicesiThrough the maker's account

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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.

10m2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Specification table row reads Bluetooth operating range 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

1 of 3 differ

Low latency mode

Not available

Yes2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Manual names game mode among the Soundcore app functions. A reviewer says it can only be switched from the app. No latency figure is published.

Claimed latency

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Not available

Lowest claimed latency

Not available

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Compatibility

2 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.

Not available

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 V20i

Feature	Needs
Multipoint	Turn on multipoint in the Soundcore app first, then connect the second device from the app or by holding both touch areas for 3 seconds.
Earbud lights	Turn on the lights in the Soundcore app. Effect, brightness, colour and automatic switch-off are set in the app.
Game mode, equalizer, remapped touch controls and firmware updates	Soundcore app on Android or iOS. The app does not support digital audio players.

Source2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Manual says the app unlocks equalizer, game mode, touch controls, lights and firmware updates. Japan page says the app does not support digital audio players.

Official licence

Not available

Not available

Battery and charging

7 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

Not available

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.

No3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876QSG.pdfRead 15 October 2026Safety text says the product contains non-replaceable Li-ion batteries and tells users not to 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 V20i

Mode	Includes case recharges	Hours (h)
ANC off	No	8
ANC off	Yes	36

Source1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Table gives up to 8 hours for the earbuds and up to 36 hours with the case. No codec, volume or lights setting is stated. Earbud lights reduce playtime per a reviewer, but the maker states no figure. The FAQ also gives up to 6 hours for calls without naming the component scope, so it is not stored.

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

8h=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

Not available

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

8h=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

36h=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

Not available

Talk time (claimed)

Not available

Not available

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.

90min1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Table row reads about 1.5 hours for the earbuds and about 4 hours for the earbuds plus case.

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

Maker lists about 1.5 hours for the earbuds and about 4 hours for the earbuds plus the charging case. The manual gives these as maximums. Case input is 5 V 0.52 A.1Maker product pageankerjapan.com/products/a3876Read 15 October 2026

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.

10min1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Page text says about 10 minutes of charging gives up to 1 hour of music 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.

1h1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Maker states 1 hour after 10 minutes of charging. The charging path, ANC, codec and volume are not stated. Read as earbuds-only playback because the case totals are given separately.

Charging case

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

Not available

700mAh2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Specification table lists one battery capacity of 700 mAh without naming the component. Multitronic describes the 700 mAh as the charging case battery. The earbud capacity is not published.

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.

No3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876QSG.pdfRead 15 October 2026Same statement applies to the whole product.

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-C1Maker product pageankerjapan.com/products/a3876Read 15 October 2026

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.

No8Reviewscarbir.com/tws/soundcore-v20i-reviewRead 15 October 2026Review lists no wireless charging.

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

Not available

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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

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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

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Controls

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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.

Touch2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026

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.

Touch2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Volume up and down are listed as functions that the Soundcore app can assign to a touch gesture.

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.

Right double tap: play or pause, Left double tap: next track, Double tap during a call: answer, Hold for 2 seconds during a call: reject or end2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Stereo mode table: right double tap plays or pauses, left double tap skips forward, a double tap on either earbud answers a call, a 2 second hold on either earbud rejects or ends a call. Back, volume and voice assistant are set in the app.

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.

Yes2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026

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.

Voice assistant2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026

Sensors and health

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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.

Not available

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.

Not available

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

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Health features

Not available

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Fit and durability

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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

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Ear tip materials

Not available

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

Not available

Ear hook8Reviewscarbir.com/tws/soundcore-v20i-reviewRead 15 October 2026Ear hooks hold the earbuds in four adjustable positions.

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.

IP551Maker product pageankerjapan.com/products/a3876Read 15 October 2026Table row reads IP55. The maker text names SweatGuard. The case is not given a rating.

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

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Software

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Companion app

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

soundcore2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Manual names the Soundcore app with Google Play and App Store links.

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, iOS2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026

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.

Yes2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Manual describes firmware updates through the Soundcore app.

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Not available

Dimensions and weight

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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.

9.3g(0.3 oz)1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Table row reads about 9.3 g / about 76.4 g without labels. The 76.4 g value is the earbuds plus case. Read 9.3 g as one earbud because two earbuds and a 57.8 g case would total 76.4 g in retailer listings. The maker row is unlabelled, so this reading is an inference.

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

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

Not available

Not available

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.

2AOKB-A3876L, 2AOKB-A3876R3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876QSG.pdfRead 15 October 2026Left earbud model A3876L FCC ID 2AOKB-A3876L. Right earbud model A3876R FCC ID 2AOKB-A3876R.

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.

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In the box

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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.

Soundcore V20i earbuds, Charging case, USB-C cable, Quick start guide1Maker product pageankerjapan.com/products/a3876Read 15 October 2026Package list: Soundcore V20i, charging case, USB-C cable, quick start guide, warranty and customer support information.

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 V20i

Type	Count
USB-C	1

Source1Maker product pageankerjapan.com/products/a3876Read 15 October 2026One USB-C 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/soundcore-v20i4Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Maker US store page.

Spec sheet

Not available

www.ankerjapan.com/products/a38761Maker product pageankerjapan.com/products/a3876Read 15 October 2026Japanese page with the product specification table. It states size, weight, IP rating, Bluetooth, codecs, playback, charging time, charging port, driver and model numbers.

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.

lp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdf2Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3876Manual.pdfRead 15 October 2026Anker Japan hosts the A3876 user manual in Japanese. English panels were not found. The product specification table is on the last page.

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.

1.5years6Maker product pageus.soundcore.com/pages/warrantyRead 15 October 2026US store lists 18 months for all headphone series. The quick start guide also gives an 18-month limited warranty, with 12 months for India.

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