Earbuds / Compare

Bose Ultra Open Earbuds vs Bose Ultra Open Earbuds (2nd Gen)

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Product A: Bose

Ultra Open Earbuds

64 of 166 known

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B

Product B: Bose

Ultra Open Earbuds (2nd Gen)

71 of 166 known

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Every value links to where we found it.

Only differences

ABose Ultra Open Earbuds

BBose Ultra Open Earbuds (2nd Gen)

General

4 of 8 differ

Series

Not available

Not available

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.

897806-0010, 444638, 638L, 638R3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026US Black SKU from exact retailer source also cited below. Original multilingual guide regulatory printed pages 4 and 7: case 444638, left 638L, right 638R.4Retailer pagebhphotovideo.com/c/product/2001094-REG/bose_897806_0010_ultra_open_true_wireless.htmlRead 8 October 2026Exact US Black retailer listing MFR 897806-0010. Regulatory 444638/638L/638R are separately proved by the original manufacturer guide.

GTIN / EAN

Not available

0178178627144Retailer pagebhphotovideo.com/c/product/2001094-REG/bose_897806_0010_ultra_open_true_wireless.htmlRead 8 October 2026Exact US Black MFR 897806-0010 UPC 017817862714.

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.

17 September 20262Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026September 17, 2026 announcement. US availability October 1, 2026, preorders September 19. Release date follows primary rather than SoundGuys October 2 metadata.

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 pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 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

Bose Ultra Open Earbuds2Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026Bose's September 2026 release calls the Ultra Open Earbuds (2nd Gen) the next generation and compares them with the first-generation model.

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.

$2992Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026US $299 launch price for Ultra Open Earbuds 2nd Gen. Sport Open $199 is a separate model.

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

€299.956Maker product pagebose.de/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 10 October 2026Bose Germany store showed 299,95 EUR incl. VAT on 2026-10-10 with no strike-through or discount, nine days after the October 1 release. Bose France showed the same 299.95 EUR. Neither page labels the figure as a launch price. It is read as the launch list price because the product is days old. The first-generation model sits at 349,95 EUR on the same page.

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.

US1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

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 Smoke, Cherry Chocolate, Olive Green, Sky Pink1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Exact US model family. Last three colors are limited editions. Reference is US Black 897806-0010.

Segment

Not available

Not available

Design

0 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 pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 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 cuff1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

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 bud1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

RGB lighting

Not available

Not available

Drivers and sound

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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

BBose Ultra Open Earbuds (2nd Gen)

Type	Count per earbud
Dynamic	1

Source4Retailer pagebhphotovideo.com/c/product/2001094-REG/bose_897806_0010_ultra_open_true_wireless.htmlRead 8 October 2026Exact model specifications explicitly list Dynamic and 1 per Earpiece. Acoustic role and diameter not published. No transfer from first generation or separate Sport Open model.

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

Not available

Dynamic4Retailer pagebhphotovideo.com/c/product/2001094-REG/bose_897806_0010_ultra_open_true_wireless.htmlRead 8 October 2026Exact retailer Dynamic entry. Source microphone 4, NFC, touch-sensor and supplied-cable claims contradict stronger primary documents and are not used.

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

Not available

Not available

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

Not available

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

Not available

Not available

Impedance

Not available

Not available

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

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.

33Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 19 explicitly lists bass, midrange and treble adjustment in Bose app. At high volumes adjustments may be reduced to avoid distortion.

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

Not available

Bass Boost, Treble Reducer5Reviewsoundguys.com/bose-ultra-open-earbuds-2nd-gen-review-164060Read 8 October 2026Review names Bass Boost and Treble Reducer as examples. Stored list only contains these proven names, not an inferred complete preset inventory.

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.

Bose Immersive Audio, Cinema Mode with Bose TrueSpatial2Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026Launch paragraph specifically names Cinema Mode powered by Bose TrueSpatial, spatializing video/podcasts with centered dialogue. Manual separately proves Bose Immersive Audio and its Still/Motion settings.3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed pages 21 to 24 Immersive Audio Off/Still/Motion and Stereo/Immersion/Cinema listening modes. Cinema uses Still plus video spatialization. Current maker/launch names Cinema TrueSpatial.

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.

Yes3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 21 Still holds virtual speakers in position while head moves, then recenters after stopping. Motion setting follows the user. No source-specific spatial content required.

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.

No1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

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

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

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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.

Bass extends lower than the first generation but remains below the review preference curve below about 80 Hz. Treble is less harsh than the original. The review reports bass distortion at higher listening volumes.5Reviewsoundguys.com/bose-ultra-open-earbuds-2nd-gen-review-164060Read 8 October 2026Exact review objective measurements compare with the SoundGuys headphone preference curve. No numeric target deviations or graph-derived values stored.

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.

Artificial test-head recordings have clear voice in quiet conditions. Office and street noise suppression also removes much of the voice, leaving it muffled. The windy sample contains almost no audible speech. The non-vibrating test head cannot activate the voice pickup units as a real person would, so real calls may differ.5Reviewsoundguys.com/bose-ultra-open-earbuds-2nd-gen-review-164060Read 8 October 2026Exact review quiet, office, street and windy recordings use an artificial test head that does not vibrate like a real human head. The voice pickup units cannot work as they do on a real person, so actual calls may differ. These sample results cannot establish complete real-person VPU-assisted call performance.

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.

BBose Ultra Open Earbuds (2nd Gen)

ANC	Hours (h)
No	13.02

Source5Reviewsoundguys.com/bose-ultra-open-earbuds-2nd-gen-review-164060Read 8 October 2026One-week review of maker-supplied exact 2nd Gen Cherry Chocolate 897806-0030. Reported standardized battery test 13 h 1 min converted to 13.0167 h. ANC absent. Review frames this as standard playback before reduction with Immersive Audio/AutoVolume, but does not explicitly state those test flags, codec, firmware, source or level. These remain unknown. Header 10 g and October 2 release metadata not used.

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)

13.02h=CalculatedFrom Battery life (measured)

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

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

22Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026One dedicated microphone and one voice pickup unit in each earbud. Two physical voice microphones across pair, not four. VPU excluded. Retailer four-voice-mic table is not used.

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

21Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Technical table explicitly states 2 Microphones for the product. Launch press release separately states one dedicated microphone plus one voice pickup unit in each earbud. VPU is excluded from the physical microphone total.

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

AI2Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026SpeechClarity explicitly described as AI-enhanced voice-isolation 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

3 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.

Bluetooth1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

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 pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 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, AAC, aptX Adaptive2Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026Both new models SBC/AAC. Ultra Open 2 additionally aptX Adaptive via Snapdragon Sound on compatible Android devices. No aptX Lossless or bitrate/sample-rate inferred.

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

No5Reviewsoundguys.com/bose-ultra-open-earbuds-2nd-gen-review-164060Read 8 October 2026Exact October 7, 2026 review explicitly says no Auracast. Bluetooth LE Audio capability itself is not stated and remains unknown.

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.

Yes3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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.

23Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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.

63Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 35 says up to six devices stored, separately two actively connected. No current exact support revision found establishing a different memory count.

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.

Google Fast Pair3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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.

9m3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 36 explicitly gives 30 ft or 9 m. Use maker metric value rather than converting rounded 30 ft to 9.144 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

None of 3 known

Low latency mode

Not available

Not available

Claimed latency

Not available

Not available

Lowest claimed latency

Not available

Not available

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, iOS4Retailer pagebhphotovideo.com/c/product/2001094-REG/bose_897806_0010_ultra_open_true_wireless.htmlRead 8 October 2026Exact listing app-compatible Android and iOS. Generic Bluetooth computers also supported by maker, but named Windows/macOS/Linux platform support is not stated.

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.

BBose Ultra Open Earbuds (2nd Gen)

Feature	Needs
Google Fast Pair	Android 6 or higher, Bluetooth and Location enabled, Google Play Services notifications enabled.
Snapdragon Sound / aptX Adaptive	Snapdragon Sound-certified source device, such as a compatible Android device.
Device voice control	Assign an earbud shortcut in the Bose app. Uses the connected device's voice assistant.
Spotify Tap	Assign an earbud shortcut in the Bose app and use the current Spotify app.

Source3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

Official licence

Not available

Not available

Battery and charging

5 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 manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Regulatory and legal information, English printed page 5: "DON'T attempt to remove the rechargeable lithium-ion battery from this product. Contact your local Bose retailer or other qualified professional for removal." No user replacement procedure is documented. Page 3 also says to contact Bose customer service for battery service options.

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.

BBose Ultra Open Earbuds (2nd Gen)

Mode	Spatial audio	Includes case recharges	Hours (h)
ANC off	No	No	9
ANC off	Yes	No	5
ANC off	No	No	5
ANC off	Yes	No	4

Source3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 31 footnote 3: Bose April 2026 production-representative units, IEC 60268-1 pink noise via Bluetooth A2DP, RSSI -75 dBm, playback loudness 75 dBA, three-band EQ zero. Codec not stated. Rows in order: Immersive Audio Off + Auto Volume Off 9 h, Immersive On + Auto Volume Off 5 h, Immersive Off + Auto Volume On 5 h, both On 4 h. ANC absent. Earbuds-only maxima. These four claims are explicit, not a combined 5 h unspecified condition.

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

9h=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

9h=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

Not available

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.

60min3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 31 earbuds up to 1 h. Depleted earbuds charged to 100% in a fully charged case. April 2026 maker testing.

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

Bose lists up to 19.5 additional hours from the case with Immersive Audio and Auto Volume off, up to 11 hours with either on, and up to 8.5 hours with both on. The original manual instead lists 28.5, 16 and 12.5 additional hours. Total playback including case recharges is not resolved.1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Current FAQ and September 17 launch both state 19.5 additional case hours at standard playback. Manual printed page 31 and footnote 4 explicitly say 28.5 additional, not total. No case total is calculated or stored.

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.

10min3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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.

2h3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 31 footnotes 1 and 2 depleted earbuds 10 min in fully charged closed case, then A2DP playback 75 dBA, EQ zero, Immersive Off and Auto Volume Off, up to 2 h. Codec unstated.

Charging case

2 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

400mAh3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Regulatory information, English printed page 6, lists "Output Capacity: 400mAh (charge case)" next to the case input rating of 5 V, 1 A. The label says output capacity and gives no typical or rated qualifier. The case has no USB output, so it is read as the case battery capacity. Not charging input current.

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 manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Same page 5 statement covers the product, listed as Model 444638 Wireless Earbuds with Charging Case. No user case battery procedure is documented.

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 pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 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.

180min3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 31 charging case up to 3 h wired. Time varies with earbuds inside case. Qi charging time not specified.

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.

Yes3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 29 supports a compatible third-party wireless charger sold separately. Charging standard not named.

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

Not available

Not available

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.

Button3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 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.

Buttons3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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, Double-press, Triple-press, Press and hold, Press, then press and hold3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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.

Yes3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 20 independent press-and-hold shortcuts per earbud. Does not claim all button actions can be remapped.

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.

Phone's native voice assistant3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 25 Device Voice Control: a shortcut set in the Bose app opens the connected device voice control through the earbud microphones. The product page also names Amazon Alexa with Alexa+ access, but the launch press release says Alexa+ support arrives with a firmware update after October 1, so Alexa is not stored.

Sensors and health

2 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.

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.

Voice pickup unit2Press releasebose.com/pressroom/bose-sport-open-earbuds-and-bose-ultra-open-earbuds-2nd-genRead 8 October 2026Launch release: each earbud has one dedicated microphone and one voice pickup unit. Bose does not say how the unit senses speech, and its FAQ says the earbuds do not use bone conduction for sound. Stored as a verbatim sensor name only. voice_pickup_sensor stays empty.

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

1 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

Not available

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.

IPX41Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

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

0 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.

Bose app1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

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, iOS1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 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.

Yes3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 43 automatic updates through connected Bose app when available. Planned Find Hub/Alexa+/Apple Music features are not stored as available without release evidence.

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Not available

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.

5.9g(0.2 oz)1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Bud Single 0.013 lb, converted using 453.59237 g/lb and rounded to 5.9 g. Published mass is rounded and applies to one bud. Retailer 5.7 g is not used.

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.

Width17.7Height18.9Depth27.7mm(0.7 × 0.7 × 1.1 in)1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Maker-labelled one-bud axes: 0.746 in H x 0.697 in W x 1.091 in D. Converted with 25.4 mm/in and rounded to 0.1 mm.

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.

49.9g(1.8 oz)1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Case 0.110 lb, converted using 453.59237 g/lb and rounded to 49.9 g. Published mass is rounded. Retailer 48.2 g is not used.

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.

Width26.8Height47.5Depth66mm(1.1 × 1.9 × 2.6 in)1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Maker-labelled case axes: 1.870 in H x 1.056 in W x 2.598 in D. Converted with 25.4 mm/in and rounded to 0.1 mm.

Certifications

0 of 3 differ

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.

A94638L, A94638R3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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.

Snapdragon Sound3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026Printed page 40 explicitly names Snapdragon Sound technology, paired with certified compatible source device.

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.

2 Bose Ultra Open Earbuds (2nd Gen), Charging case, Quick Start Guide, Safety Sheet1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026Maker list is corroborated by exact US Abt and original manual. No USB cable or power adapter included. The charging accessory is the case, despite generic technical-table charging-accessory Yes.

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.

BBose Ultra Open Earbuds (2nd Gen)

Not available

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.

www.bose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.html1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026

Spec sheet

Not available

Not available

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.

assets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdf3Owner's manualassets.bosecreative.com/asset/b512e4d6-8ac6-45c5-a4da-2e9aef467ef2/898298_OG_UOEBII27-HEADPHONEOPN_ML.pdfRead 8 October 2026

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

0 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.

1year1Maker product pagebose.com/p/earbuds/bose-ultra-open-earbuds-2nd-gen/ULT2-HEADPHONEOPN.htmlRead 8 October 2026US one-year Bose limited warranty. Optional purchased BoseCare excluded.

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