Earbuds / Compare

Bose QuietComfort Earbuds II vs soundcore Space A40

A

Product A: Bose

QuietComfort Earbuds II

74 of 166 known

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B

Product B: soundcore

Space A40

76 of 166 known

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Every value links to where we found it.

Only differences

ABose QuietComfort Earbuds II

Bsoundcore Space A40

General

7 of 8 differ

Series

QuietComfort1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Not available

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

870730-0010, 870730-00204Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026Spec box lists 870730-0010 for the Triple Black unit.9Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026870730-0010 Triple Black. The Soapstone listing on the same retailer gives 870730-0020.

A3936, A39360121Maker product pageus.soundcore.com/products/space-a40-a3936011.jsRead 8 October 2026Current Black sales SKU is A3936012, despite historical URL handle A3936011. Core hardware model is A3936 from the original and current service documentation. A changed sales-code suffix is not claimed to be either a hardware revision or packaging-only change.

GTIN / EAN

Not available

1946441022721Maker product pageus.soundcore.com/products/space-a40-a3936011.jsRead 8 October 2026Exact current official Black variant barcode 194644102272. Other colours have separate barcodes and are not represented as SKU rows.

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

7 September 20221Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Not available

Status

Discontinued2Maker product pagesupport.bose.co.uk/product/bose-quietcomfort-earbuds-ii/01t8c00000OydAFAAZRead 10 October 2026The former Bose product page URL now redirects to the earbuds category, which no longer lists the QuietComfort Earbuds II. The support page is reported to give the sale period as 2022 to 2025.

Available1Maker product pageus.soundcore.com/products/space-a40-a3936011.jsRead 8 October 2026Native official US public product JSON identifies Black variant 41956103487678 as available true. Stock is a point-in-time observation, not a permanent quantity claim. The legacy page contains both visible and hidden Sold out template text, so native variant availability is used.

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

Not available

Not available

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

Bose QuietComfort Ultra Earbuds11Reviewsoundguys.com/bose-quietcomfort-ultra-earphones-vs-bose-quietcomfort-earphones-ii-102644Read 23 October 2026SoundGuys calls the QuietComfort Ultra Earbuds a direct successor to the QuietComfort Earbuds II.

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/quietcomfort-earbuds-iiRead 10 October 2026US MSRP 299 USD in the Bose release. US prices exclude sales tax.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026Tested at 299 USD, 280 GBP and 429 AUD at the September 2022 launch.

$99.995Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026Manufacturer-issued August 25, 2022 release explicitly says A40 is available in the US for USD 99.99. Space Q45 pricing is separate.

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

€99.995Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026Same exact A40 section lists EUR 99.99 in Germany and Europe. Current sale price is not launch MSRP.

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

Not available

US1Maker product pageus.soundcore.com/products/space-a40-a3936011.jsRead 8 October 2026

ColoursiThe maker's own colour names

Triple Black, Soapstone1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Triple Black at launch. Soapstone announced for later in 2022.

Black, White, Navy Blue, Fresh Green, Purple1Maker product pageus.soundcore.com/products/space-a40-a3936011.jsRead 8 October 2026

Segment

Music1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Music2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

Design

1 of 4 differ

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

In-ear1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

In-ear2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

Stem5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026The design incorporates a stem that hosts the touch controls.

Stemless2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Current exact-SKU maker gallery shows compact stemless in-ear buds. No inference about microphone or driver quantity is made from appearance.

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

Either bud6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026February 2023 firmware lets either bud be used alone, even if the other is empty.7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026Editor's note dated 16 February 2023 states a firmware update allows single-bud use with either the left or right bud.

Either bud2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact current maker FAQ explicitly permits taking either left or right bud alone and returning the unused bud to the case.

RGB lighting

Not available

Not available

Drivers and sound

10 of 17 differ

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

ABose QuietComfort Earbuds II

Type	Diameter (mm)
Dynamic	9.3

Source7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026Specs list 9.3 mm transducers. Count per bud and role are not stated.

Bsoundcore Space A40

Type	Diameter (mm)
Dynamic	10

Source4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Original and current guide explicitly identify a 10 mm dynamic driver. Physical transducer quantity per bud is not separately stated, so count remains unknown rather than inferred from one row.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026Newer A3936 guide has the same core 10 mm dynamic, 16 ohm, 53 mAh x 2 / 800 mAh, 20 Hz to 20 kHz and 10 m specification table. It prints Bluetooth 5.3 instead of the original/current-shop 5.2. That concrete discrepancy is not used to infer a firmware upgrade, hardware revision or universal measurement equivalence.

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

Dynamic9Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026Retailer spec table lists driver type Dynamic.

Dynamic4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026

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

9.3mm=CalculatedFrom Drivers per bud

10mm=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

Not available

Diaphragm material

Not available

Metal-ceramic, double-layer diaphragm5Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026A40-specific paragraph names innovative 10 mm double-layer-diaphragm drivers with metal-ceramic material. Silk is specified for the separate 40 mm Space Q45 driver and is not transferred.

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 kHz4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Both guide tables explicitly publish acoustic 20 Hz to 20 kHz response. This is not extended to 40 kHz or 96 kHz from a wireless Hi-Res certification or codec name.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026

Impedance

Not available

16Ω4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Original rendered English table explicitly shows 16 ohms. The newer guide corroborates it with readable text.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026

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

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026CustomTune plays a tone when the buds are placed in the ears. A microphone inside the bud measures the ear canal response and tailors the sound frequency profile within half a second.

Not available

Personalised soundiA profile from a hearing test or ear scan

Not available

Yes5Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026A40-specific HearID procedure automatically tunes audio frequencies to personal hearing. This is distinct from manually selecting EQ sliders.13Maker product pageservice.soundcore.com/article-description/Four-Steps-to-Make-Your-soundcore-Space-A40-Earbuds-Sound-BetterRead 8 October 2026

Onboard EQ

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Not available

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

36Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026

85Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026A40-specific sound section explicitly publishes eight-band custom EQ. The current maker sound-improvement article separately confirms 22 presets, without publishing a complete name list.13Maker product pageservice.soundcore.com/article-description/Four-Steps-to-Make-Your-soundcore-Space-A40-Earbuds-Sound-BetterRead 8 October 2026Exact support article confirms 22 EQ presets and HearID sound profile. The eight-band count comes directly from the maker launch release. Full preset names are not invented.

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

Bass Boost, Bass Reducer, Treble Boost, Treble Reducer6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026Bass Boost, Bass Reducer, Treble Boost and Treble Reducer presets plus a three-band EQ.

Not available

Volume limit

Not available

Not available

Spatial audio

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

Not available

3D Surround Sound8Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026The newer official A3936 guide, PDF created August 27, 2025 and linked by the current service index, explicitly lists 3D Surround Sound among app features. Exact enabling app or firmware version is not published. This is a current documentation claim, without asserting a launch feature or availability on the original reviewed firmware 3.19.

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

No8Reviewtomsguide.com/reviews/bose-quietcomfort-earbuds-2Read 10 October 2026The review states 3D (spatial) audio is not available.

Not available

Noise cancelling

5 of 11 differ

Active noise cancelling

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

Hybrid1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Four microphones per bud, one inside and three outside, feed the ANC system. Interior and exterior microphones together make this hybrid.

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.

81Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Bose states four microphones in each bud sense and measure unwanted noise for ANC. Four per bud, eight across the pair. Whether all are also used for calls is not stated.

Not available

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

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026CustomTune measures the ear canal response each time the buds are placed in the ears, then tunes noise cancellation. It continuously adapts to changing noise in the environment.

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

106Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026Custom noise-cancelling modes use a ten-point scale for the ANC level. Stored as 10.

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

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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.

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Aware Mode with ActiveSense. ActiveSense applies noise cancellation only while loud sounds last. It blends cancellation into transparency and is not an activity-based switch.

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

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker FAQ identifies a selectable Wind Noise Reduction mode within ANC and Transparency settings. It automatically activates when detected wind crosses its threshold. This is distinct from the separate AI call-noise processing.

Measured

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

SoundGuys finds the default response has under-emphasized mids and over-emphasized sub-bass. Bass is much stronger than on any previous Bose headset.3Measurementsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026Written objective assessment. Out of the box under-emphasized mids and over-emphasized sub-bass against the SoundGuys target.

SoundGuys measured the default Soundcore Signature profile close to its Headphone Preference Curve, with lower bass and high-frequency output relative to that target.7Reviewsoundguys.com/anker-soundcore-space-a40-review-81004Read 8 October 2026Original reference sample and same firmware/app as the named SoundGuys review. Specific default profile and target are preserved. No chart amplitude is estimated as an exact bass/treble deviation.

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

SoundGuys finds microphone quality standard. It rejects faraway noise decently and handles wind noise poorly.3Measurementsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026Lab and demo recordings in ideal, office, street and windy conditions. Standard quality, decent rejection of faraway noise, weak wind handling.

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

ABose QuietComfort Earbuds II

Hours (h)
7.25

Source3Measurementsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026SoundGuys loop test of constant real music playback peaking at 75 dB SPL lasted 7 h 15 min on one charge. Stored as 7.25 h. Noise-control mode, firmware and codec are not stated. The earbuds cannot switch ANC off, so the row sets no ANC flag.

Bsoundcore Space A40

ANC	Hours (h)
Yes	7.92

Source7Reviewsoundguys.com/anker-soundcore-space-a40-review-81004Read 8 October 2026SoundGuys purchased its original retail A3936011 reference sample, tested for one week on firmware 3.19 and app 3.1.1. Constant audio playback peaking at 75 dB SPL with ANC on ran 7 h 55 min, converted to hours. Host and codec are not identified. The current sales code A3936012 is separately named, not described as the tested unit. A hardware change or unchanged-hardware reason for the suffix change is not asserted. The quoted case recharge count and projected well-over-24-hour total are not stored as measured case runtime. Identity was checked against the actual A3936 maker manuals and current selected-SKU specifications: the 10 mm dynamic driver, 16 ohm impedance, 53 mAh x 2 / 800 mAh battery system, 20 Hz to 20 kHz acoustic range, 10 m range and selected 5.2 radio claim match. No declared current physical component difference was found. This remains the named original test, without claiming current stock was directly retested.

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

7.25h=CalculatedFrom Battery life (measured)

7.92h=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

4 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

62Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Current maker specification states six microphones with AI for calls. Counts the physical microphones across the pair. Logical ANC/call uses are not counted as separate microphones.

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.

81Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Four microphones in each bud, one on the inside and three on the outside. Eight across the pair.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 20267Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026

62Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Published six microphones across the earbud pair are counted once, without adding separate counts for their ANC functions. No case microphone is inferred.

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

DSP1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Bose cites improved voice pickup from an updated noise removal algorithm. Stored as DSP. No AI claim is made.

AI2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

Yes6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026

Not available

Connectivity

8 of 18 differ

Chip

Qualcomm S5 Audio SoC10Press articleaudioxpress.com/news/bose-to-launch-new-wireless-earbuds-powered-by-qualcomm-s5-audio-socRead 10 October 2026Qualcomm confirmed at IFA 2022 that the new Bose QuietComfort Earbuds II are powered by the Qualcomm S5 Audio SoC. Bose does not name the chip in its launch release.

Not available

Connections

Bluetooth1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Bluetooth2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

Bluetooth

5.31Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

5.22Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact current US product page and original A3936 manual explicitly state Bluetooth 5.2, selected for this current Black reference. The newer generic A3936 guide prints 5.3. No firmware upgrade, revised radio hardware or colour-specific assignment is proven. The discrepancy remains explicit and is not transferred to another revision.

Bluetooth codecs

SBC, AAC4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026Only SBC and AAC are available. The planned Snapdragon Sound aptX update announced in 2022 is not confirmed as released.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 20266Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 20268Reviewtomsguide.com/reviews/bose-quietcomfort-earbuds-2Read 10 October 2026

SBC, AAC, LDAC2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

Bluetooth profiles

A2DP, HFP9Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026

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.

No4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 20265Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 20266Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

Not available

22Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker Dual Connection describes two concurrent source devices, separate from remembered pairing records.

Multipoint with LDACiMany buds turn multipoint off on LDAC

Not available

No2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker FAQ says multipoint is automatically disabled when LDAC is enabled. Original manual also states that LDAC is unavailable with two-device connection.

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

Not available

Not available

Automatic switching between own devicesiThrough the maker's account

Not available

Not available

Fast pairing

Not available

Not available

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

9.1m9Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026Spec table lists 30 ft / 9.1 m over Bluetooth. Bose regional product pages are no longer online. Tom's Guide states up to 100 feet, which is not stored.

10m4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Direct metric claim 10 m, separate from the rounded 33 ft companion value.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026

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

3 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, iOS1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Bose states compatibility with both Apple and Android devices.

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.

ABose QuietComfort Earbuds II

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

Source1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Bsoundcore Space A40

Not available

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

ABose QuietComfort Earbuds II

Not available

Bsoundcore Space A40

Feature	Needs
LDAC audio	Compatible Android 8.0 or later source. Enable Preferred Audio Quality in soundcore. LDAC disables multipoint and increases battery consumption.
Earbud volume controls	Assign volume commands in the soundcore app. They are not enabled by default in the original reviewed setup.
3D Surround Sound	Listed in the newer A3936 app guide. Exact minimum app and firmware version is not published, so availability on firmware 3.19 is not claimed.

Source9Maker product pageservice.soundcore.com/article-description/How-to-Enable-LDAC-on-soundcore-Space-A40-EarbudsRead 8 October 2026Exact manufacturer LDAC guide identifies Android 8.0 or later and app-controlled mode. Volume and current documented 3D Surround conditions come from their separate cited maker/review sources, without inventing a firmware rollout.

Official licence

Not available

Not available

Battery and charging

12 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

53mAh4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Guide table explicitly states 53 mAh x 2 earbuds, so 53 mAh per bud. Typical versus rated capacity and nominal cell voltage are not labelled.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026

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.

Not available

Not available

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 QuietComfort Earbuds II

Mode	Includes case recharges	Hours (h)
ANC on	No	6
ANC on	Yes	24

Source1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Up to 6 hours per charge. The case adds three further charges for 24 hours in total. Bose release does not name the noise-control mode. What Hi-Fi? and B&H label the 6 hours as Bluetooth with ANC. The earbuds cannot switch ANC off.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026Tech specs list 6 hours (BT + ANC) and 24 hours including the charging case.

Bsoundcore Space A40

Mode	Codec	Includes case recharges	Hours (h)
ANC off	Not available	No	10
ANC off	Not available	Yes	50
ANC on	Not available	No	8
ANC on	Not available	Yes	40
Transparency	Not available	No	8
Transparency	Not available	Yes	40
ANC off	LDAC	No	6
ANC off	LDAC	Yes	30
ANC on	LDAC	No	5
ANC on	LDAC	Yes	25
Call	Not available	No	6

Source3Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker playtime FAQ separates Normal 10 h / 50 h total, ANC 8 h / 40 h, transparency 8 h / 40 h, LDAC off-ANC 6 h / 30 h and LDAC with ANC 5 h / 25 h. Total means initial earbud charge plus case recharges, as explicitly confirmed by the manual. Non-LDAC codec is not named, so AAC or SBC is not guessed. The selected playtime FAQ states default Anker laboratory settings and 50 percent volume. A separate discharging-troubleshooting answer says 60 percent volume for the same 8/10-hour estimates. Neither is silently substituted for the other. Call row is the maker Normal/ANC-off six-hour claim, with no codec assigned. Its separate ANC-on five-hour call claim cannot be distinguished by the call enum and remains in this note.

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.

6h=CalculatedFrom Claimed battery life

10h=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.

6h=CalculatedFrom Claimed battery life

8h=CalculatedFrom Claimed battery life

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

Not available

10h=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.

24h=CalculatedFrom Claimed battery life

50h=CalculatedFrom Claimed battery life

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

24h=CalculatedFrom Claimed battery life

40h=CalculatedFrom Claimed battery life

Talk time (claimed)

Not available

6h=CalculatedFrom Claimed battery life

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

60min1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Bose states the case fully charges the buds in one hour.

120min2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker charging FAQ explicitly says about two hours to fully charge earbuds, converted to 120 minutes. Adapter, initial percentage and cable are not separately specified. This is an approximate maker estimate, not a reviewer charge measurement.

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

Not available

The maker estimates about two hours for a full earbud charge, three hours for the case by USB-C cable, or 3.5 hours for the case wirelessly. Ten minutes in the case is claimed to give up to four hours of earbud playback. Use a certified USB-C charging cable. The manual lists a 5 V / 0.65 A input, without an inferred charging-wattage or USB-PD claim. Fully dry the earbuds and port before charging. ANC, LDAC, calls and volume affect runtime.3Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Component-specific approximate times come from the exact public maker FAQ. The original and newer guide SPECS row says only two hours, while its charging diagram depicts three hours beside the powered case. That generic table alone is not used to assign case-only timing. The explicit component-specific FAQ supports the stored bud and cable-case estimates. Literal 5 V / 0.65 A input is not converted into accepted watts or a charging protocol.

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

20min1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Bose states a quick 20-minute charge gives up to two hours of playback.

10min2Maker product pagesoundcore.com/products/space-a40-a3936011Read 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.

2h1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Earbuds-only playback of up to 2 hours after 20 minutes in the case.

4h2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Maker claims up to four hours of earbud listening after ten minutes in the case. Exact mode, codec and volume for the quick-charge claim are not stated. The 50-hour case-inclusive headline is separate.

Charging case

3 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

800mAh4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Guide table separately states 800 mAh case-cell capacity. No USB output capacity or energy conversion is inferred.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026

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.

Not available

Not available

Case charging port

USB-C1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

USB-C2Maker product pagesoundcore.com/products/space-a40-a3936011Read 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.

180min1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Bose states the case fully recharges in three hours via USB-C.

180min2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker charging FAQ explicitly says about three hours for the case by USB-C cable, converted to 180 minutes, and about 3.5 hours wirelessly. The latter is kept in visible charging guidance, not substituted for the cable field.

Wireless charging

No4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 20265Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 20266Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

Not available

Qi5Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026Exact A40 battery paragraph explicitly says the case can be placed on a Qi wireless charging pad. Qi2, magnetic attachment and wireless wattage are not inferred.

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

4 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.

Touch, Swipe1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 20266Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026

Touch2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

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

Swipe6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 20267Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026

Touch2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Exact maker volume FAQ permits assigning volume gestures in soundcore Controls. Source phone volume alone is not treated as earbud controls.

Gestures

Single tap: play or pause, Double tap: next track, Triple tap: previous track, Swipe up or down: volume, Touch and hold: noise-cancelling mode or voice assistant (assignable)6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026Single, double and triple tap and swipe up or down are fixed. Long press on either bud is assignable to noise-cancelling mode switching or the voice assistant.

Double tap left: play/pause, Double tap right: next track, Double tap either bud: answer/end call, Hold either bud 2 seconds: noise-control mode or reject call4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Original complete stereo/mono controls table. Volume can be assigned in soundcore, without asserting it is enabled by default.

Remappable controls

Yes6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 20268Reviewtomsguide.com/reviews/bose-quietcomfort-earbuds-2Read 10 October 2026

Yes2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

Voice assistant

Google Assistant, Siri, Bixby8Reviewtomsguide.com/reviews/bose-quietcomfort-earbuds-2Read 10 October 2026Google Assistant, Siri and Bixby all work with the earbuds.

Not available

Sensors and health

3 of 9 differ

In-ear detection

Yes6Reviewexpertreviews.co.uk/bose/1417760/bose-quietcomfort-earbuds-ii-reviewRead 10 October 2026The app can pause playback when a bud is removed and answer calls when a bud is inserted.7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 20269Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026

Not available

Sensors

Not available

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

Yes5Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026The maker describes the HearID personal-hearing procedure that tunes frequencies to individual hearing. This is a consumer sound-personalization assessment, not a medical hearing diagnosis.

Hearing protectioniLimits sudden loud sounds

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026ActiveSense reduces loud disruptions in Aware Mode for as long as they last.

Not available

Health features

Not available

Not available

Fit and durability

2 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.

S, M, L1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Fit Kit supplies three sizes of ear tips and three sizes of stability bands. Sizes S, M and L from the B&H box contents.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026Three sizes of ear tips and three stability bands as standard.

XS, S, M, L, XL4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Complete original and current WEARING diagrams list XS, S, M, L and XL. Maker launch release and independent box overview corroborate five sizes/pairs. Brief marketing says four tip options without clarifying whether fitted tips are excluded, so that phrase does not override the complete five-size list.11Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000018508/en_US/000018508.pdfRead 8 October 2026

Ear tip materials

Silicone1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026

Silicone5Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026Exact A40 design paragraph explicitly names five different-sized silicone tips.

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

Stability bands1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026Separate stability bands that hug the contour of the ear, with an umbrella-shaped silicone ear tip.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026

None7Reviewsoundguys.com/anker-soundcore-space-a40-review-81004Read 8 October 2026Reviewer explicitly says no stabilizing wings or similar fittings. This is direct negative evidence, not an omission from a box list.

Ear tip fit test

Yes1Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 20265Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 202613Maker product pageservice.soundcore.com/article-description/Four-Steps-to-Make-Your-soundcore-Space-A40-Earbuds-Sound-BetterRead 8 October 2026

Dust and water rating, buds

IPX41Press releasebose.com/pressroom/quietcomfort-earbuds-iiRead 10 October 2026IPX4 rating for sweat and water resistance.4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026

IPX42Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026

Dust and water rating, case

Not available

Not available

Water resistance depth

Not available

Not available

Software

1 of 6 differ

Companion app

Bose Music4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026Bose Music app for iOS and Android, used for updates, EQ and ANC settings.

soundcore4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026

App platforms

Android, iOS4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026

Android, iOS4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026

User firmware updates

Yes4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026

Yes4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Not available

Dimensions and weight

2 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.

6.2g(0.2 oz)4Reviewsoundguys.com/bose-quietcomfort-earbuds-ii-review-78772Read 10 October 2026Spec box lists 6.24 g per earbud. What Hi-Fi? and Reviewed state 6.2 g. Stored 6.2 g.5Reviewwhathifi.com/reviews/bose-quietcomfort-earbuds-iiRead 10 October 2026Tech specs list 6.2 g each.7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026Specs list 6.2 grams per earbud.

4.9g(0.2 oz)2Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Current maker specification and single-earbud gallery caption publish 4.9 g. Tip size is not stated. SoundGuys lists 4.6 g for its older sample without calling that a measured result. No weight is transferred into a measured field.

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

Not available

Not available

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

59.8g(2.1 oz)7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026Specs list 59.8 grams for the charging case. Tom's Guide lists 2.1 oz.

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.

Not available

Not available

Certifications

1 of 3 differ

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

Not available

Hi-Res Audio Wireless5Press releaseprnewswire.com/news-releases/soundcore-unveils-space-series-with-two-new-anc-wireless-models-with-stronger-anc-and-long-lasting-battery-life-301612025.htmlRead 8 October 2026Exact A40 sound section names Hi-Res Wireless certification with LDAC. Separate Q45 wired certification is not transferred.

Communication certifications

Not available

Not available

FCC IDs

Not available

Not available

Other certifications

Not available

Not available

In the box

2 of 2 differ

In the box

Bose QuietComfort Earbuds II, Charging case, USB-C to USB-A cable, 3 pairs of silicone ear tips (S, M, L), 3 pairs of stability bands (S, M, L)7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 20269Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026

Left and right earbuds, Charging case, Five pairs of silicone ear tips, USB-A to USB-C charging cable, Quick Start Guide, Safety Guide10Reviewconsumerreports.org/electronics-computers/headphones/soundcore-by-anker-space-a40/m408250Read 8 October 2026Independent public indexed Consumer Reports overview explicitly lists five pairs of earpieces, charging cradle/recharge battery/carry case, USB-A to USB-C charging cable, Quick Start Guide and Safety Guide. Those combined cradle/battery/carry-case terms refer to the charging case, not three separate accessories. Later full-page open returns an access restriction. No paid test table or bypass is used. This is the standard model box overview, not a claim of a distinct current SKU bundle revision.

Cables included

ABose QuietComfort Earbuds II

Type	Count
USB-C to USB-A charging cable	1

Source7Reviewreviewed.com/headphones/content/bose-quietcomfort-ii-earbuds-reviewRead 10 October 2026A 12-inch USB-C to USB-A charge cable is included.

Bsoundcore Space A40

Type	Count
USB-A to USB-C	1

Source10Reviewconsumerreports.org/electronics-computers/headphones/soundcore-by-anker-space-a40/m408250Read 8 October 2026The same public box overview names one USB-A to USB-C connector cable. Length is not stated and is not borrowed from another Soundcore model.

Links

Not compared

Product page

support.bose.co.uk/product/bose-quietcomfort-earbuds-ii/01t8c00000OydAFAAZ2Maker product pagesupport.bose.co.uk/product/bose-quietcomfort-earbuds-ii/01t8c00000OydAFAAZRead 10 October 2026Bose support page for the product. Its specification content is script-rendered and could not be read, so no specification is cited from it.

us.soundcore.com/products/space-a40-a39360111Maker product pageus.soundcore.com/products/space-a40-a3936011.jsRead 8 October 2026

Spec sheet

Not available

www.soundcore.com/products/space-a40-a39360112Maker product pagesoundcore.com/products/space-a40-a3936011Read 8 October 2026Current official US full specifications and exact FAQ answers were captured through ordinary public indexed web results. Later full-page requests can redirect by region to Anker Nordics. No access barrier is bypassed. Official direct US native product JSON separately verifies the selected Black sales SKU and availability.

Manual

Not available

salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdf4Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000009262/en_US/000009262.pdfRead 8 October 2026Original official A3936 User Manual from the current service index. English APP, WEARING, CHARGING, CONTROLS, LDAC and SPECS sections were read. English SPECS page EN 04, PDF page 6, was rendered to verify 16 ohms where text extraction corrupts the font.

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.

1year9Retailer pagegreentoe.com/product/Bose_QuietComfort_Earbuds_II_Noise-Canceling_True_Wireless_In-Ear_Headphones__Triple_870730-0010Read 10 October 2026Limited 1-Year Warranty on the US listing. A Belgian retailer lists 2 years for its market.

1.5years6Maker product pageservice.soundcore.com/article-description/How-to-Wear-Space-A40-Earbuds-CorrectlyRead 8 October 2026Exact manufacturer Space A40 support article explicitly states an 18-month warranty, converted to 1.5 years. This is separate from statutory consumer rights or a retailer return period.

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