Earbuds / Compare

CMF Buds Pro 2 vs soundcore P40i

A

Product A: CMF

Buds Pro 2

78 of 166 known

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B

Product B: soundcore

P40i

84 of 166 known

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All 166 fields

Every value links to where we found it.

Only differences

ACMF Buds Pro 2

Bsoundcore P40i

General

3 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.

69744342259301Maker product pagecheckout-us.nothing.tech/products/cmf-buds-pro-2.jsRead 8 October 2026Exact current manufacturer sales SKU is 6974434225930, also its GTIN. The physical revision code is not proven for this sales SKU. Original guide B172, a 2025 declaration B187, and currently linked B195 declarations are not silently mapped to it.9Maker spec sheet (PDF)cdn.shopify.com/s/files/1/0376/5420/0459/files/CMF_Buds_Pro_2_EU_DoC_Multilingual.pdfRead 8 October 2026Current family-linked declaration prints B195, software V1.0.1.33, signed August 17, 2026. Family PSTI likewise prints B195. A 2025 declaration prints B187, while the downloadable user guide prints B172. None supplies an exact bridge to the selected current US sales SKU, so physical model-code mapping and revision-specific certifications remain unknown.

A3955, A3955Z11, A3955Z21, A3955Z31, A3955ZQ1, A3955N11, A3955N21, A3955N31, A3955NQ11Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026US SKUs A3955Z11, A3955Z21, A3955Z31, A3955ZQ1 from the store's product data (products/p40i-a3955011.js)2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Japan model list: N21 Off White, N11 Black, N31 Navy, NQ1 Purple.

GTIN / EAN

69744342259301Maker product pagecheckout-us.nothing.tech/products/cmf-buds-pro-2.jsRead 8 October 2026Exact current Dark Grey native barcode 6974434225930. Other colours have separate current barcodes.

194644186340, 194644190989, 194644190965, 1946441909581Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026Variant barcodes in the store's product data: Black 194644186340, Oat White 194644190989, Navy Blue 194644190965, Purple 1946441909585Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026

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

Not available

Not available

Status

Available1Maker product pagecheckout-us.nothing.tech/products/cmf-buds-pro-2.jsRead 8 October 2026Native official US product data directly identifies Dark Grey variant 45068151816344 as available true. Stock is a point-in-time observation, not a permanent quantity claim.

Available5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026Anker Nordics store (Anker Innovations) lists all four colours as available for sale

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.

Not available

soundcore P42i23Press releaseprtimes.jp/main/html/rd/p/000000662.000016775.htmlRead 23 October 2026Anker Japan's press release calls the Soundcore P42i the next-generation model of the Soundcore P40i.24Press articleav.watch.impress.co.jp/docs/news/2121578.htmlRead 23 October 2026AV Watch calls the Soundcore P42i the next-generation model of the Soundcore P40i.

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

Not available

Not available

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

Not available

Not available

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

US1Maker product pagecheckout-us.nothing.tech/products/cmf-buds-pro-2.jsRead 8 October 2026

US, JP1Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026Exact-model US and Japanese maker store pages. Regional color/SKU rows verified separately.2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Anker Japan exact A3955/P40i product available in Japanese official store. Regional SKUs documented separately.

ColoursiThe maker's own colour names

Orange, Dark Grey, Light Grey, Blue1Maker product pagecheckout-us.nothing.tech/products/cmf-buds-pro-2.jsRead 8 October 2026

Black, Oat White, Navy Blue, Purple, Off White, Navy1Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 20262Maker product pageankerjapan.com/products/a3955Read 30 September 2026Japanese product model list: Off White, Black, Navy and Purple. US labels Oat White and Navy Blue retained separately.

Segment

Music2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Not available

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-ear2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

In-ear7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026Type: In-ear

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

Stem2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Stem1Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026Product photos show stem buds

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

Not available

Either bud5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026FAQ: either earbud can be used on its own

RGB lighting

Not available

Not available

Drivers and sound

11 of 17 differ

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

ACMF Buds Pro 2

Role	Diameter (mm)	Count per earbud
Woofer	11	1
Tweeter	6	1

Source2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current table names an 11 mm bass driver and 6 mm micro-planar tweeter. Dual-driver acoustics establishes one of each per earbud. The maker does not explicitly name the magnetic architecture or bass transducer technology, so type cells and the aggregate driver_type are left unknown.

Bsoundcore P40i

Type	Diameter (mm)	Count per earbud
Dynamic	11	1

Source1Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026Published as 11 mm composite drivers with BassUp2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Specifications: 11 mm dynamic driver.3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026

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

Not available

Dynamic3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications table (PDF page 7): 11 mm dynamic driver.

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

11mm=CalculatedFrom Drivers per bud

11mm=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.

2=CalculatedFrom Drivers per bud

1=CalculatedFrom Drivers per bud

Diaphragm material

11 mm bass driver: PU + PET, titanium-coated. 6 mm micro-planar tweeter: PET + titanium-coated PET.2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Sound table publishes two diaphragm descriptions alongside the two named driver rows. Material text retains their bass/tweeter order and the exact micro-planar description. No original-review driver architecture is imported.

Not available

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

Min20 HzMax40 kHz2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current maker acoustic comparison explicitly labels Buds Pro 2: 20~40000Hz. This is the earbud frequency range, not inferred from the LDAC sample rate.

Min20 HzMax20 kHz3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications table (PDF page 7): 20 Hz to 20 kHz.

Impedance

Not available

14Ω3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications page 10: impedance 14 ohms.

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.

96kHz2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current LDAC section directly states up to 24 bits/96 kHz/990 kbps with a compatible LDAC source. This does not establish lossless playback.

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.

24bits2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Direct current LDAC claim, conditional on a compatible source and enabled codec. Not inferred from Bluetooth version.

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

Yes4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026App guide page 5: HearID Sound builds a hearing-sensitivity profile using a tone test.

Onboard EQ

Not available

Not available

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

312Reviewsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026App section: custom circular tri-band equalizer, separate from the Ultra Bass mode. Read from the original 2024 review, so the current Nothing X band count was not rechecked.

Not available

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

Not available

Default, Acoustic, Bass Booster, Bass Reducer, Classical4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026App settings guide page 5 screenshot: five named preset buttons shown, translated from Japanese. The maker says 22 presets exist, but remaining names were not established.

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.

Spatial Audio Effect2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current maker explicitly names Spatial Audio Effect based on HRTF. No Dolby format, dynamic head tracking or object-audio decoding is inferred.

Movie mode4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026App settings guide pp 3/6: Movie mode gives a 3 D sound effect.

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

Not available

Not available

Noise cancelling

4 of 11 differ

Active noise cancelling

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Modes (PDF page 5): noise cancellation with automatic strength depending on ambient noise, plus manual and scene modes.

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

Hybrid2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

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.

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current maker describes automatic detection and compensation for ear-canal noise leakage, plus environment-adaptive mode in Nothing X. This does not prove real-time adaptive EQ.

Yes3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Modes (PDF page 5): noise cancellation with automatic strength depending on ambient noise.

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

Not available

510Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 7 October 2026Maker exact P40i app guide page 4 manually selectable ANC strength boxes explicitly numbered 1, 2, 3, 4, 5. Automatic adaptation and three scene choices are different controls. Off and transparency not counted. Guide UI firmware example 01.58 appears on page 8, without an asserted current firmware maximum.

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

50dB2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current maker names up to 50 dB Hybrid ANC with coverage up to 5000 Hz. Its footnote calls 50 dB a theoretical laboratory maximum. Coverage up to 5000 Hz does not establish the frequency at which maximum attenuation occurs. No reviewer-measured overall attenuation is substituted.

45dB11Press articlefashaoyou.net/archives/35647Read 7 October 2026Original February 28, 2024 MWC report on exact P40i expressly says adaptive ANC, up to 45 dB maximum noise reduction. Manufacturer claim reported by press, not reviewer measured average. Frequency and laboratory method are unpublished. Inaccessible retailer artwork and its unverifiable comparative footnote are not used.

Transparency mode

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Modes (PDF page 5): external-sound transparency.

Adjustable transparency

Not available

Yes4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026Mode settings p 4: transparency offers All Ambient and Voice Focus modes.

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.

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Call functions table explicitly names Wind Noise Reduction 3.0, so this is call-processing evidence. Other page prose retains 2.0 wording. No separate user-selectable listening/ANC wind toggle or physical wind-mesh design is inferred.

Yes5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026Maker P40i FAQ explicitly gives the Wind Noise Reduction app setting.

Measured

6 of 23 differ

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

Bass is raised by about 12 to 15 dB between 20 and 400 Hz and peaks near 50 Hz. The treble from 5 to 20 kHz shows several peaks and dips.12Reviewsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026Objective Measurements section against the SoundGuys house curve, original 2024 review sample. Bass boost 20 to 400 Hz and treble variation 5 to 20 kHz are quoted from the text. No dB target values are stored.

Boosted bass sound signature. The response stays close to its bass-heavy tuning, with treble variations that can veil detail or brighten sibilants. SoundGuys tested a purchased A3955 on firmware 1.67. With its Default profile, its B&K 5128 measurement shows a bass peak roughly 12 dB above the SoundGuys preference target around 60 Hz and a broad treble peak about 5 dB above target around 3-5 kHz. These are local peaks, not regional bass/treble averages. The two labs use different targets.7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026Our Verdict: Audio Reproduction Accuracy21Reviewsoundguys.com/anker-soundcore-p40i-review-143328Read 7 October 2026Added SoundGuys paragraph only. Actual lab FR against its stated preference curve, Default profile, purchased exact A3955, firmware 1.67. General documented rig B&K 5128, B&K 1704C-102 and SoundCheck. Exact host/codec/test level unstated. Bass 12 dB is a local peak, not the existing RTINGS regional amount 9 dB. Existing RTINGS text/figures retained.22Reviewsoundguys.com/how-we-testRead 7 October 2026Reviewer official method: B&K 5128 fixture, powered by B&K 1704C-102, SoundCheck-controlled measurement. Target is SoundGuys preference curve.

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

9dB7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026Public summary: Very Emphasized (9 dB). Test bench 2.3, Black unit. Full results are behind a paywall and were not read

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

5dB7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026Public summary: Very Emphasized (5 dB)

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

Recorded speech samples cover ideal, office, street, windy and reverberant conditions. Voices sound slightly muffled. Background noise reduction is very good, especially in wind.12Reviewsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026Microphone section and demos recorded by SoundGuys on the original 2024 sample. Office, street, windy and reverberant demos were listened to as described by the reviewer.

Voice sounds distorted and thin on calls. In loud conditions the mics separate noise decently but can cut out parts of speech. SoundGuys standardized artificial-mouth recordings cover ideal, office, street, wind and reverberant conditions on firmware 1.67. Its original review reports overly aggressive suppression can cut small speech segments. Host/codec are unstated. No numeric rejection value inferred from listener votes.7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026Our Verdict: Microphone21Reviewsoundguys.com/anker-soundcore-p40i-review-143328Read 7 October 2026Added SoundGuys controlled-recording paragraph only. Its general method uses prerecorded speech from calibrated artificial mouth, with/without simulated noise and reverberation. Product review publishes those samples and describes suppression dropouts. Firmware 1.67. Host/codec unstated. Existing RTINGS description retained.22Reviewsoundguys.com/how-we-testRead 7 October 2026Reviewer official method: calibrated artificial mouth plays prerecorded phrases in chamber, optionally with simulated background/reverberation. Conditions are measurement procedures, not a subjective untested listening note.

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.

ACMF Buds Pro 2

ANC	Hours (h)
Yes	6.25

Source13Measurementsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026Battery section: "In our testing" the buds lasted roughly 6 hours 15 minutes with ANC on, stored as 6.25 h. Earbuds only, one charge. Codec, volume and firmware are not stated in the review. SoundGuys states its standard method on its how-we-test page. The tested sample is the original 2024 unit, and the current sales revision is not proven identical.

Bsoundcore P40i

Hours (h)
9.3

Source7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026Public P41i comparison explicitly states P40i 9.3-hour continuous battery life. Travel verdict rounds it to nine hours. Test bench 2.3, ANC and codec settings not publicly stated.

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

6.25h=CalculatedFrom Battery life (measured)

9.3h=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

0 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.

62Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Call functions table states six microphones in total across the pair. They serve voice capture. Shared ANC functions do not add microphones.

61Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 20262Maker product pageankerjapan.com/products/a3955Read 30 September 2026Call feature: six beamforming microphones across the pair.

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.

62Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Six total microphones across the earbud pair, counted once. Current table calls the call processing Clear Voice Technology 3.0 and wind processing Wind Noise Reduction 3.0, while other page text retains 2.0 wording. Processing-version conflict does not create extra physical microphones.

611Press articlefashaoyou.net/archives/35647Read 7 October 2026Original February 28 MWC launch report explicitly says six physical microphones, three in each earbud. IT Home separately says each bud internally contains three. Maker six beamforming call-mic claim corroborates six, but no ANC role count inferred. This field counts all physical mics across the pair, excluding case.

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

AI12Reviewsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026Calls section: six microphones and an AI noise reduction algorithm. The review sample is the original June 2024 unit. The current maker table calls the processing Clear Voice Technology 3.0 without the word AI.

AI1Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026Published as 6 mics and an AI algorithm

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

4 of 18 differ

Chip

Not available

Not available

Connections

Bluetooth2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Bluetooth2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Communication specifications: Bluetooth 5.3. No wired or dongle audio connection listed.

Bluetooth

5.42Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current US table explicitly states Bluetooth 5.4. Generic support FAQ and original B172 documents say 5.3. Current listing is represented, with the historical conflict retained. No firmware-only radio upgrade or physical revision code is invented.

5.33Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications table (PDF page 7): Bluetooth 5.3.

Bluetooth codecs

LDAC, AAC, SBC3Maker product pagesupport.nothing.tech/hc/en-us/articles/26468752574481-What-audio-formats-does-CMF-Buds-Pro-2-supportRead 8 October 2026Current exact-model support answer explicitly lists LDAC, AAC and SBC. Main current listing independently advertises LDAC, and the exact-model battery FAQ names AAC and LDAC. No LE Audio support or absence is inferred from the changed radio version.

SBC, AAC2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Maker comparison table: P40i column lists SBC and AAC. LDAC belongs to other products.

Bluetooth profiles

Not available

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.

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Multipoint instructions connect two devices simultaneously. (PDF page 4)

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

26Maker product pagesupport.nothing.tech/hc/en-us/categories/25890107917585-CMF-Buds-Pro-2Read 8 October 2026Current family support explicitly describes two phones connected concurrently and prioritization between their music and calls, matching the current listing Dual connection. An older reviewer called this No Multipoint while acknowledging dual-device pairing. The documented concurrent behavior meets this field definition.

23Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Multipoint chapter: connects to two devices simultaneously.

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.

Not available

Not available

Automatic switching between own devicesiThrough the maker's account

Not available

Not available

Fast pairing

Google Fast Pair, Microsoft Swift Pair2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Google Fast Pair2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Exact P40i feature paragraph explicitly supports Google Fast Pair for Android.

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

Not available

10m3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications page 10: Bluetooth operating range 10 m.

Wireless receiveri2.4 GHz dongle

Not available

Not available

Receiver connector

Not available

Not available

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

Not available

Not available

Latency

2 of 3 differ

Low latency mode

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Product feature: Game mode.4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026

Claimed latency

ACMF Buds Pro 2

Connection	Mode	Latency (ms)
Bluetooth	Low Lag Mode with a Nothing phone	120

Source12Reviewsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026Review states Low Lag Mode "reduces latency to less than 120ms when used with a Nothing Phone". The Nothing page footnote 8 says as low as 120 ms, but that footnote list mixes in text for other CMF Buds. Stored as 120 ms, a ceiling with a Nothing phone and Low Lag Mode on. No other phone brand is covered.

Bsoundcore P40i

Not available

Lowest claimed latency

120ms=CalculatedFrom Claimed latency

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, iOS2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current features table lists Android and iOS with minimum Android 6.0 and iOS 13. Bluetooth audio route only. Console, PC and Mac support is not stated.

Windows, macOS, Android, iOS12Maker product pageankernordics.com/products/p40i-a3955011Read 7 October 2026Exact P40i maker FAQ specifically covers Windows input/output, Mac Bluetooth audio, Android-phone Bluetooth volume and iPhone audio. Documented playback paths, not generic inference from Bluetooth version. No console/Linux platforms added.

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.

ACMF Buds Pro 2

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

Source2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Both mobile systems connect over Bluetooth per the Android and iOS features row. Microphone behaviour per platform is not stated, so microphone_works is left out.

Bsoundcore P40i

Platform	Connection	Microphone works
Windows	Bluetooth	Yes
macOS	Bluetooth	Not available
Android	Bluetooth	Not available
iOS	Bluetooth	Not available

Source12Maker product pageankernordics.com/products/p40i-a3955011Read 7 October 2026Exact FAQ documents Bluetooth pairing/playback on Windows, Mac, Android and iPhone. Windows microphone explicitly assigned soundcore P40i Hands-Free in conferencing software and system input, so microphone_works true only for that proved row. Unknown per-platform mic flags omitted.

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

ACMF Buds Pro 2

Feature	Needs
Android and iOS compatibility	Current listing specifies Android 6.0 or above and iOS 13 or above. Some older family FAQ wording says Android 5.0.
LDAC audio	Use a compatible LDAC source and enable high-quality audio in Nothing X. Up to 24-bit/96 kHz is a codec claim, not lossless playback. Current physical-revision support for simultaneous LDAC and Dual Connection or Dirac is not established.
Spatial Audio Effect	Enable HRTF spatial processing in Nothing X. No specific source format or dynamic head tracking is claimed.
Smart Dial on the case	Configure the case dial in Nothing X. It supports volume, playback, noise-mode, voice-assistant, low-lag and mic-mute commands. Case-only mute does not establish on-ear microphone mute.
Earbud volume controls	Assign double tap and hold in Nothing X Controls. Hold after the double tap to change volume. Case dial rotation is a separate option.

Source2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Android minimum is 6.0 and iOS minimum is 13. Generic older FAQ says Android 5.0. Current table is used without claiming all advanced functions operate identically across platforms. Case Smart Dial requires configuration in Nothing X and includes microphone mute. It does not establish an earbud mic mute control.5Maker product pagesupport.nothing.tech/hc/en-us/articles/26468737625489-How-do-I-adjust-the-volume-on-CMF-Buds-Pro-2Read 8 October 20266Maker product pagesupport.nothing.tech/hc/en-us/categories/25890107917585-CMF-Buds-Pro-2Read 8 October 2026Current maker listing independently confirms the same case-dial functions. The support description adds that it has no assigned function by default and must be configured in Nothing X. It does not prove a current physical revision code.

Bsoundcore P40i

Feature	Needs
Google Fast Pair	Compatible Android device.
HearID Sound and custom sound settings	soundcore app on iOS or Android. Firmware must be updated as instructed by the maker.
Game mode and Movie mode	soundcore app.
Custom touch controls	soundcore app. Single tap cannot be assigned Voice Assistant.
Find Earbuds audible locator	Earbuds within the Bluetooth connection range. This is a local sound locator, not a tracking network.
Microphone in Windows conferencing apps	Select soundcore P40i Hands-Free as the app microphone and speaker.

Source13Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 7 October 2026Exact maker app guide pages 2, 5, 6, 7, 8 establishes iOS/Android app, HearID, immersive modes, custom controls and audible finder within Bluetooth range. Exact Japan maker page binds Fast Pair to Android. Nordic FAQ supplies Windows Hands-Free and assistant assignment restriction. No unstated minimum OS/version/codec inferred.14Maker product pageankernordics.com/products/p40i-a3955011Read 7 October 2026Exact Windows FAQ explicitly assigns Hands-Free for conferencing input/output. Exact assistant FAQ says single tap cannot invoke assistant. These are requirements, not Microsoft Teams certification.15Maker product pageankerjapan.com/pages/soundcore-p40iRead 7 October 2026Exact Google Fast Pair paragraph specifically identifies Android devices. Page footnote tells users to ensure firmware is updated when using the soundcore app, while basic earbuds playback also works without the app. No unstated platform minimum or firmware version is inferred.

Official licence

Not available

Not available

Battery and charging

10 of 13 differ

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

60mAh2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current battery table explicitly 60 mAh for one earbud. Typical or rated capacity is not stated.

60mAh3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications table (PDF page 7): 60 mAh x 2 earbuds.

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.

ACMF Buds Pro 2

Mode	Codec	Includes case recharges	Hours (h)
ANC off	AAC	No	11
ANC off	AAC	Yes	43
ANC on	AAC	No	6.5
ANC on	AAC	Yes	26
Transparency	AAC	No	6.5
Transparency	AAC	Yes	26
ANC off	LDAC	No	6.5
ANC off	LDAC	Yes	25
ANC on	LDAC	No	4.3
ANC on	LDAC	Yes	16.6
Transparency	LDAC	No	4.3
Transparency	LDAC	Yes	16.6
Call	Not available	No	6
Call	Not available	Yes	25
Call	Not available	No	4.8
Call	Not available	Yes	18.6

Source2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current battery table states 11 hours earbuds-only and 43 hours with case for ANC off, matching the model-specific FAQ. A page-body sentence instead says ten hours from the 60 mAh earbud. The specified table/FAQ claim is represented with that body conflict explicit, without claiming a rounding method or tested revision.4Maker product pagesupport.nothing.tech/hc/en-us/articles/26468705886993-How-long-is-the-battery-life-of-CMF-Buds-Pro-2Read 8 October 2026Current model-specific FAQ publishes AAC playback off 11/43 h and on/transparency 6.5/26 h, matching the current main listing. It also declares LDAC off 6.5/25 h and on/transparency 4.3/16.6 h. Playback test conditions are 50% volume and 25 C. Exact physical model code, firmware and spatial-processing state are not stated. These are current published maker claims, not measured performance transferred from a historical unit. Call rows are explicitly ANC off: 6 h earbuds only and 25 h including case. The following call rows are ANC on or Transparency: 4.8 h earbuds only and 18.6 h including case. No AAC codec is assigned to calls from a generic playback test footer. Call ANC state is recorded here as required by the table contract.

Bsoundcore P40i

Mode	Includes case recharges	Hours (h)
ANC off	No	12
ANC off	Yes	60
ANC on	No	10
ANC on	Yes	50
Transparency	No	10
Transparency	Yes	50
Call	No	7

Source3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications p 10: 12/60 h ANC off, 10/50 h ANC on, earbuds-only versus case-inclusive. Transparency 10/50 h and call 7 h from Nordic English FAQ.5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026FAQ: Transparency 10 h buds and 50 h with the case. Calls 7 h with ANC off and 6.5 h with ANC on

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.

11h=CalculatedFrom Claimed battery life

12h=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.

6.5h=CalculatedFrom Claimed battery life

10h=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.

11h=CalculatedFrom Claimed battery life

12h=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.

43h=CalculatedFrom Claimed battery life

60h=CalculatedFrom Claimed battery life

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

26h=CalculatedFrom Claimed battery life

50h=CalculatedFrom Claimed battery life

Talk time (claimed)

6h=CalculatedFrom Claimed battery life

7h=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.

60min2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current table explicitly full charge with charging case: 60 minutes, earbuds only. The separate 85-minute number is for the charging case and earbuds together, not an empty-case charge.

60min3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications page 10: up to one hour for earbuds. Nordic FAQ says around 50 minutes, manual preferred.5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026FAQ says around 50 mins, lab data at 25 +/- 3 degrees C

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.

Current maker table claims 60 minutes to fully charge earbuds in the case and 85 minutes for the charging case and earbuds together by USB-C. The historical family page claimed 70 minutes for the combined set. No current empty-case full-charge duration is established. The headline claims up to seven hours after a ten-minute charge, without clearly identifying its earbud-only or case-inclusive scope. It is not assigned to the earbuds-only quick-charge field. A cable is omitted from current new-sale box lists, while transitional retailer stock may still include one. Generic CMF Buds disclaimer figures on the page do not match this Pro 2 table and are not substituted.2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current US table names 85 minutes combined, versus the historical 70-minute family claim. The page also contains generic CMF Buds disclaimer text about 35.5-hour playback, two microphones per bud and other charge times that conflicts with the exact Pro 2 table. Those generic statements are not used as Pro 2 numeric facts. No charger input wattage or case-only duration is inferred.

Not available

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

Not available

10min3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Manual page 3 charging diagram: 10-minute charge for 5 hours of playback. ANC state unspecified.

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.

Not available

5h3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Manual page 3 charging diagram: 10-minute charge for 5 hours of playback. ANC state unspecified.

Charging case

4 of 10 differ

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

460mAh2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current battery table explicitly 460 mAh for the case. Input current and output capacity are not substituted.

800mAh3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications table (PDF page 7): 800 mAh case.

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-C2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

USB-C3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Manual page 1 overview: USB-C charging port.

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.

Not available

180min3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Specifications page 10: up to three hours for case by cable.5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026FAQ: around 3 hours via a wall charger, 4 hours via a wireless charger

Wireless charging

No8Owner's manualcdn.shopify.com/s/files/1/0585/5258/2321/files/Buds_Pro_2_User_Guide.pdfRead 8 October 2026Charging page describes only a power cable for the case and gives no wireless charging step. This agrees with SoundGuys, which answers No to wireless charging.12Reviewsoundguys.com/cmf-buds-pro-2-review-big-features-small-price-smart-dial-123206Read 10 October 2026FAQ: "No, they do not have wireless charging."

Yes2Maker product pageankerjapan.com/products/a3955Read 30 September 20265Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 20266Owner's manualcdn.shopify.com/s/files/1/0519/2355/0368/files/51005004317_V2_soundcore_Headphone_A3955_EU_Offline_QSG_Safety_90x90mm_20240117.pdfRead 30 September 2026Lists a WPT operating frequency of 110 KHz-205 KHz

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

Not available

Qi16Reviewsoundguys.com/anker-soundcore-p40i-review-143328Read 7 October 2026Approved original A3955 reviewer explicitly says case supports Qi wireless charging. Maker manual specifies placing case in charger centre and safety document WPT band. This is compatible Qi, not an invented WPC certificate/ID, Qi2 or MagSafe support.

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.

Touch2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Touch3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Manual page 1 overview: touch control area.

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

Touch5Maker product pagesupport.nothing.tech/hc/en-us/articles/26468737625489-How-do-I-adjust-the-volume-on-CMF-Buds-Pro-2Read 8 October 2026Specific model FAQ permits assigning double tap and hold on an earbud, separate from rotating the case Smart Dial. Current maker touch-control table and configurable-controls list corroborate the compatible operation. Source phone buttons are not counted as earbud volume control.

Touch5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026FAQ: volume on the buds is set up in the app under Controls, Customize Volume Adjustment

Gestures

Double tap: skip forward, answer/hang up calls, Triple tap: skip back, reject calls, Tap and hold: switch ANC/Transparency2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Single tap, Double tap, Press and hold for 2 seconds3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Controls table: x 1 tap, x 2 double tap, 2 second press and hold

Remappable controls

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Controls instructions expressly customisable via Soundcore app. (PDF page 4)

Voice assistant

Voice assistant of the connected phone, ChatGPT (CMF and Nothing phones)2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Nothing X app section: "Use Buds Pro 2 to call up ChatGPT from your CMF and Nothing phones." The original user guide lists wake up voice assistant as an optional earbud function without naming an assistant.8Owner's manualcdn.shopify.com/s/files/1/0585/5258/2321/files/Buds_Pro_2_User_Guide.pdfRead 8 October 2026Operations page: optional earbud functions include wake up voice assistant. No named assistant. Applies to the original B172 guide.

Siri12Maker product pageankernordics.com/products/p40i-a3955011Read 7 October 2026Exact FAQ instructs remapping touch action to phone Voice Assistant and separately troubleshoots Siri volume. Siri is directly named. Generic Android assistant support does not identify Google Assistant/Gemini, so no brand guessed. Single tap cannot activate assistant.

Sensors and health

3 of 9 differ

In-ear detection

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Not available

Sensors

Not available

Touch sensors17Maker product pageankerjapan.com/pages/soundcore-p40iRead 7 October 2026Exact maker paragraph explicitly names touch sensors and a raised dot placed on them for intuitive operation. Sensor technology is not called capacitive/optical because not stated. This does not establish wearing detection, motion or health sensors.

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

Yes4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026Sound Effects p 5: HearID hearing test plays several frequency tones to create a hearing-sensitivity profile. Consumer personalization, not a clinical test.

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Not available

Not available

Fit and durability

3 of 7 differ

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

S, M, L2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

XS, S, M, L, XL3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Manual page 2 fit diagram: XS, S, M, L and XL tips.

Ear tip materials

Silicone7Maker product pagesupport.nothing.tech/hc/en-us/articles/26468689235857-What-Material-is-the-CMF-Buds-Pro-2-Made-OfRead 8 October 2026

Silicone16Reviewsoundguys.com/anker-soundcore-p40i-review-143328Read 7 October 2026Original P40i review explicitly names five pairs of silicone tips with integrated grilles. No foam or hybrid tips imported from optional aftermarket accessories.

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

Not available

None7Reviewrtings.com/headphones/reviews/anker/soundcore-p40i-true-wirelessRead 30 September 2026They lack wings or stabilizers

Ear tip fit test

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026App guide page 3: earbud fit test.

Dust and water rating, buds

IP552Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

IPX52Maker product pageankerjapan.com/products/a3955Read 30 September 2026IPX5, buds only5Maker product pageankernordics.com/products/p40i-a3955011Read 30 September 2026

Dust and water rating, case

Not available

Not available

Water resistance depth

Not available

Not available

Software

2 of 6 differ

Companion app

Nothing X2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

soundcore4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026Soundcore app, from the App Store or Google Play

App platforms

Android, iOS2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

iOS, Android4Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Guide.pdfRead 30 September 2026App installation expressly App Store iOS or Google Play Android. (PDF page 2)

User firmware updates

Yes2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Yes3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Firmware update user instructions app Settings/download. (PDF page 6)

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.

4.9g(0.2 oz)2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Buds design table explicitly one-bud mass 4.9 g. Tip size is not stated. This is a maker claim, not a reviewer weight measurement.

5g(0.2 oz)2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Product specifications: approximately 5 g per earbud. 58 g with case includes earbuds and is not case-only.

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

Width20.2Height33.1Depth23.8mm(0.8 × 1.3 × 0.9 in)2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Buds design table explicitly labels height 33.1, width 20.2 and depth 23.8 mm. Axis labels are retained without reordering by appearance.

Not available

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

46g(1.6 oz)2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Case design table gives 46 g separately from the one-bud 4.9 g figure. No case-inclusive total is used.

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.

Width53.4Height53.4Depth23mm(2.1 × 2.1 × 0.9 in)2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current Case design table explicitly height and width 53.4 mm, depth 23 mm.

Not available

Certifications

2 of 3 differ

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

Hi-Res Audio Wireless2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026

Not available

Communication certifications

Not available

Not available

FCC IDs

Not available

2AOKB-A39556Owner's manualcdn.shopify.com/s/files/1/0519/2355/0368/files/51005004317_V2_soundcore_Headphone_A3955_EU_Offline_QSG_Safety_90x90mm_20240117.pdfRead 30 September 2026FCC ID: 2AOKB-A3955, IC: 23451-A3955

Other certifications

Not available

EU Radio Equipment Directive 2014/53/EU conformity, EU RoHS Directive 2011/65/EU and amendment 2015/863 conformity, ISED IC 23451-A3955, Japanese radio technical conformity mark18Maker spec sheet (PDF)salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000027115/en_US/000027115.pdfRead 7 October 2026Producer EU/UK titled declaration V3.0 explicitly binds soundcore P40i Model A3955 to RED 2014/53/EU and RoHS 2011/65/EU plus 2015/863. Signed July 15, 2025. Exact safety guide supplies IC 23451-A3955. Japanese exact maker product page explicitly says technical conformity mark approved product, 2.40-2.48 GHz. No UK statutory names inferred from the combined document title and no standard-number typo silently corrected.19Owner's manualcdn.shopify.com/s/files/1/0519/2355/0368/files/51005004317_V2_soundcore_Headphone_A3955_EU_Offline_QSG_Safety_90x90mm_20240117.pdfRead 7 October 2026Matching safety guide explicitly prints IC 23451-A3955. Existing FCC ID 2AOKB-A3955 remains. Japan radio marking number is visible in text but no certifier name guessed.20Maker product pageankerjapan.com/products/a3955Read 7 October 2026Exact product specification package says radio technical conformity mark approved, operating band 2.40-2.48 GHz. No unrelated medical/communications approval inferred.

In the box

2 of 2 differ

In the box

Left and right earbuds, S, M and L ear tips, Charging case, Safety and warranty information, User guide2Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current table lists earbuds, S/M/L tips, charging case, safety/warranty information and user guide. Specific maker note says cable omitted from new sales starting May 15, 2025, with transitional retailer stock potentially retaining a cable. No cable is treated as a current standard item and no blanket absence is asserted for every stock revision.

Earbuds, Charging case, Five sizes of ear tips, USB-A to USB-C cable, Safety manual, Quick start guide2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Package contents, translated from Japanese product page.

Cables included

ACMF Buds Pro 2

Not available

Bsoundcore P40i

Type	Count
USB-A to USB-C	1

Source2Maker product pageankerjapan.com/products/a3955Read 30 September 2026Package contents: USB-C and USB-A cable, one charging cable.

Links

Not compared

Product page

us.nothing.tech/products/cmf-buds-pro-21Maker product pagecheckout-us.nothing.tech/products/cmf-buds-pro-2.jsRead 8 October 2026

us.soundcore.com/products/p40i-a39550111Maker product pageus.soundcore.com/products/p40i-a3955011Read 30 September 2026Opened maker product page names exact P40i model.

Spec sheet

us.nothing.tech/products/cmf-buds-pro-22Maker product pageus.nothing.tech/products/cmf-buds-pro-2Read 8 October 2026Current US maker page embeds declarative product specification tables in its public HTML. These tables were decoded as source data without executing scripts or accessing a private API. Current claims belong to this selected sales listing, without asserting an independently tested physical revision.

Not available

Manual

cdn.shopify.com/s/files/1/0585/5258/2321/files/Buds_Pro_2_User_Guide.pdf8Owner's manualcdn.shopify.com/s/files/1/0585/5258/2321/files/Buds_Pro_2_User_Guide.pdfRead 8 October 2026Official family-download index still links this original B172 V.1 user guide. It was read alongside current specifications. This URL is historical family guidance, not proof that current SKU 6974434225930 is B172. Only controls independently corroborated by current maker listing/support are represented. Original radio, FCC identity, charge estimates and numerical reviewer tests are not transferred to current hardware.

lp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdf3Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3955Manual.pdfRead 30 September 2026Manual pairing instructions expressly name soundcore P40i. (PDF page 2)

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.

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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.

1year11Maker product pageus.nothing.tech/pages/terms-of-salesRead 10 October 2026US direct-store terms section 6.8: headphones and other electronic devices carry a limited warranty of twelve months. Applies to purchases from the Nothing US site in the buyer's original country. The start date wording differs between sections 6.1 (delivery) and 6.8 (purchase). Statutory rights are separate.

2years6Owner's manualcdn.shopify.com/s/files/1/0519/2355/0368/files/51005004317_V2_soundcore_Headphone_A3955_EU_Offline_QSG_Safety_90x90mm_20240117.pdfRead 30 September 2026EU safety guide warranty page: 24-month limited warranty. Japan has 18 months plus 6 months after Anker membership registration. Market-specific warranty.

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