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Sony WF-1000XM4 vs TOZO A1

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Product A: Sony

WF-1000XM4

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B

Product B: TOZO

A1

51 of 166 known

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Every value links to where we found it.

Only differences

ASony WF-1000XM4

BTOZO A1

General

7 of 8 differ

Series

1000X1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026

A Series1Maker product pagetozostore.com/products/a1Read 15 October 2026The store tags the product as A Series.

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

WF-1000XM4, YY29481Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 20263Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

A1 Mini1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Model: A1 Mini. The pairing name is TOZO-A1. No regulatory model code is published.

GTIN / EAN

Not available

6971681319900, 6971681319887, 6971681319870, 6971681319894, 6971681319856, 69716813198638Maker product pagetozostore.com/products/a1.jsRead 15 October 2026Store barcode field for the colours Black 6971681319900, Blue 6971681319887, Green 6971681319870, Light Khaki 6971681319894, White 6971681319856 and Rose Gold 6971681319863. The Orange, Purple and Light Purple options carry internal codes that are not valid barcodes, so they are left out. ShopSavvy lists a different barcode, 6971681317265, for a green A1.

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

8 June 20215Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

Status

Discontinued1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026Current exact Japanese maker page explicitly marks production discontinued. Regional retail stock may remain.

Available8Maker product pagetozostore.com/products/a1.jsRead 15 October 2026The store lists the product as available on 2026-10-15.

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

Sony WF-1000XM313Reviewtechradar.com/news/sony-wf-1000xm4-take-the-crown-as-the-best-true-wireless-earbuds-of-2021Read 23 October 2026TechRadar's launch report calls the WF-1000XM4 the successor to the WF-1000XM3.14Reviewnotebookcheck.net/The-Sony-WF-1000XM4-launches-with-some-exciting-features-and-an-inflated-price-tag.544040.0.htmlRead 23 October 2026Notebookcheck calls the WF-1000XM4 the follow-up to the WF-1000XM3.

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.

Sony WF-1000XM515Maker product pagesony.jp/headphone/products/WF-1000XM5/feature_2.htmlRead 23 October 2026Sony Japan's product page calls the WF-1000XM4 the previous model of the WF-1000XM5.

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.

$279.995Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Original US launch MSRP, before local sales tax. Current prices and SoundGuys rounded 278 USD are not substituted. Ordering opened June 8. Actual retail date is separately corroborated by retrospective TechRadar release/availability text.

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.

US, JP1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026Japanese exact product/store history and original US launch release separately establish JP and US. A translated support page alone does not establish another sales market.5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

ColoursiThe maker's own colour names

Black, Platinum Silver1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026Exact maker Black and Platinum Silver. US launch calls the second colour silver. No newer XM5/XM6 finish borrowed.

Black, Orange, Blue, Green, Light Khaki, White, Rose Gold, Purple, Light Purple8Maker product pagetozostore.com/products/a1.jsRead 15 October 2026Store option names, verbatim. Blue shows as unavailable on 2026-10-15. The tech specs row Color lists a different set of names, so the store option names are used.

Segment

Music5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

Design

0 of 4 differ

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

In-ear5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Sealing foam tips and ergonomic ear-cavity design. No stem on exact maker photo and manual drawings.

In-ear1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Type: In-ear True Wireless.

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

Stemless5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Stemless1Maker product pagetozostore.com/products/a1Read 15 October 2026The earbuds are a compact body with no stalk, as shown in the product photos.

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

Either bud3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Pages 19-20 either unit works alone with mobile-device assistant or no assistant. Google Assistant/Alexa assignments can restrict single-bud use to the playback-control earbud, initially the right unit. No independent simultaneous source playback inferred.

Either bud3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Section 5.0 Voice Assistant: when using a single or both earbuds, triple-tap the L/R earbud. The quick guide reset step also covers the case where only one earbud works. Either earbud is read as usable alone.

RGB lighting

Not available

Not available

Drivers and sound

4 of 17 differ

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

ASony WF-1000XM4

Type	Diameter (mm)	Count per earbud
Dynamic	6	1

Source2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026Exact maker table says closed dynamic and 6 mm. The separately opened original Crutchfield review explicitly states a single 6 mm dynamic driver in each earbud. Acoustic role is not explicitly published and remains omitted.12Reviewcrutchfield.com/S-L8b4RWU6LPi/learn/sony-wf-1000xm4-review.htmlRead 5 October 2026Original first-hand review by Jeff Miller, who auditioned this exact model for a week. Cleaner, more spacious sound paragraph and exploded-component caption explicitly say each earbud includes a single 6 mm dynamic driver. This is the physical per-earbud count. Its erroneous 13 h ANC-off battery claim is not used over exact Sony manual and launch data.

BTOZO A1

Type	Diameter (mm)	Count per earbud
Dynamic	6	1

Source1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Driver: 6 mm dynamic driver. NerdTechy says there is a 6 mm speaker inside each earbud, so one per earbud. No driver role is named.

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

Dynamic2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026

Dynamic1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Driver: 6 mm dynamic driver.

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

6mm=CalculatedFrom Drivers per bud

6mm=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.

1=CalculatedFrom Drivers per bud

1=CalculatedFrom Drivers per bud

Diaphragm material

Not available

High-elastic polymer1Maker product pagetozostore.com/products/a1Read 15 October 2026Feature text Bass Enhancement: the diaphragm utilizes a high-elastic polymer. Stored as published.

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

Max40kHz8Maker spec sheet (PDF)sony.com.my/microsite/MDR/SONY_WF1000XM4.pdfRead 5 October 2026Original maker 16-page model brochure, page 6 explicitly says drivers reproduce a full range of frequencies up to 40 kHz. This is an acoustic driver claim, separate from the Bluetooth transmission table. No acoustic lower cutoff, tolerance or test setup is supplied. Only the proved upper limit is stored. Full original PDF text read through web extraction. Direct file download returned 403.

Min20 HzMax20 kHz1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Frequency response range: 20 Hz - 20 kHz. Maker figure with no stated conditions.

Impedance

Not available

16Ω4Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026Item details Audio table: Impedance 16 ohm. This matches the label in the maker photo.9Maker product pagecdn.shopify.com/s/files/1/0737/0578/3585/files/a1mini-black-main01.webpRead 15 October 2026Main product photo on the maker store: the label inside the case lid reads Impedance 16 ohm, water resistance IPX5, battery 40 mAh, 3.7 V, 0.148 Wh. The label is read from a marketing photo and no spec table repeats the impedance.

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

Not available

Not available

Sensitivity reference

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Personalised soundiA profile from a hearing test or ear scan

Yes6Maker product pagesony.jp/headphone/products/WF-1000XM4/feature_1.htmlRead 5 October 2026Exact maker personal optimization explicitly uses individual ear shape and headphone characteristics. Fit test is separate acoustic-seal assessment.

Not available

Onboard EQ

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Volume limit

Not available

Not available

Spatial audio

1 of 2 differ

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

360 Reality Audio6Maker product pagesony.jp/headphone/products/WF-1000XM4/feature_1.htmlRead 5 October 2026Exact maker 360 Reality Audio certified model. Ear-shape optimization through companion app and supported service/content required. No head tracking inferred.

Not available

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

Not available

Not available

Noise cancelling

7 of 11 differ

Active noise cancelling

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

No4Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026Item details Noise Control: Sound Isolation. The Best Buy listing says Noise Cancelling (Active): No. The earbuds use passive isolation only.5Retailer pagebestbuy.com/product/tozo-a1-wireless-earbuds-bluetooth-5-3-lightweight-ipx5-2-mic-ai-calls-premium-sound-bass-32-eqs-charging-case-black/CZT87XXGG7Read 21 October 2026Specifications: Noise Cancelling (Active): No. Listing by a marketplace seller, model A1.

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

Hybrid5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 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.

45Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Original release explicitly two noise-sensing microphones per earbud, one feedforward and one feedback, hence four across pair.

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Transparency mode

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

Adjustable transparency

Yes7Maker product pagesony.jp/headphone/products/WF-1000XM4/feature_5.htmlRead 5 October 2026Exact maker ambient volume slider and Voice Focus. Japanese page calls 21 steps, while original Malaysian sheet says 20 slider levels. No strength-level count stored. Activity-based profile switching does not prove ANC continuously adapting or blending ANC/transparency.

Not available

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

Not available

Not available

Conversation detection

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

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.

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Automatic Wind Noise Reduction is selectable processing that detects wind and compensates. Not a physical mesh claim.

Not available

Measured

4 of 23 differ

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

The measured default response emphasizes bass and lower midrange. Output above about 2 kHz is reduced relative to the review target.10Reviewsoundguys.com/sony-wf-1000xm4-review-53454Read 5 October 2026Exact lab curve discussion, not plotted coordinate estimates. Fixture/target revision, firmware and codec unstated.

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Published quiet, office and wind recordings show usable call pickup in quiet. Background office noise and wind reduce voice clarity.10Reviewsoundguys.com/sony-wf-1000xm4-review-53454Read 5 October 2026Exact ideal/office/wind demos. Review comments on AAC quality but does not explicitly label every sample codec. No sample codec or quantitative noise-handling score inferred.

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.

ASony WF-1000XM4

Hours (h)
7.72

Source10Reviewsoundguys.com/sony-wf-1000xm4-review-53454Read 5 October 2026Exact review reports 7 h 43 min per earbud charge. ANC state, codec, original test firmware and playback level are not explicit in that paragraph and remain omitted. No claimed case total or later battery-aging reports converted into lab data.

BTOZO A1

Not available

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

7.72h=CalculatedFrom Battery life (measured)

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Microphones and calls

5 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.

45Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Speak-to-Chat paragraph explicitly combines four microphones for Precise Voice Pickup. Bone-conduction sensors are excluded from physical microphone counts. Total physical microphone count is not inferred from overlap between call and ANC roles.

24Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026Title and bullets say 2 Mics for AI Calls and the Audio table says 2 Mics ENC Clear Call. The manual labels one calling mic per earbud, so 2 is read as one per earbud.

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

Not available

24Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026No ANC, so the call microphones are the only microphones. Same evidence as the call microphone count.

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.

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

Mic noise reduction

DSP5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Precise Voice Pickup uses beamforming and advanced audio signal processing. DSEE AI is music upscaling, not proof of AI voice noise reduction.

AI4Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026Bullet: AI-Enhanced ENC for Clear Calls. This is the maker brand store wording. The maker site does not describe the microphones and a 2021 review found no advanced call noise reduction on the first release.

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

Yes3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Pages 86-92 call chapters explicitly hear own voice through microphones. No adjustable sidetone level claimed.

Not available

Connectivity

7 of 18 differ

Chip

Sony Integrated Processor V15Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

Connections

Bluetooth3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Bluetooth1Maker product pagetozostore.com/products/a1Read 15 October 2026Bluetooth only. No other connection is listed.

Bluetooth

5.22Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026

5.31Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Bluetooth version: Bluetooth 5.3. The feature text says Bluetooth 5.3.

Bluetooth codecs

SBC, AAC, LDAC2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026Published music codecs only. The SoundGuys review incorrectly infers LE Audio from Bluetooth 5.2, which is not used. A2DP transmission bandwidth does not establish acoustic response or maximum accepted input bit depth.

AAC, SBC1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Audio codec: AAC/SBC.

Bluetooth profiles

A2DP, AVRCP, HFP, HSP2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026

HSP, HFP, A2DP, AVRCP1Maker product pagetozostore.com/products/a1Read 15 October 2026Feature text: supports HSP, HFP, A2DP and AVRCP.

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.

Yes3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Pages 69-70 current manual explicitly simultaneous two-device connections with app toggle. It is a later software feature, not a launch claim. One audio stream at a time. LDAC availability during multipoint remains unproved.

Not available

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

23Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Not available

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 Pair5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Original release explicitly Google Fast Pair Android and Microsoft Swift Pair Windows 10. Manual requires Windows 10 version 1803 or later for Swift Pair.

Not available

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

10m2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026Manual page 143 specifies approximate 10 m line of sight, with surroundings affecting range. No measured range implied.

10m1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Effective Bluetooth 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

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, iOS, Windows, macOS3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

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.

ASony WF-1000XM4

Platform	Connection	Microphone works
Android	Bluetooth	Yes
iOS	Bluetooth	Yes
Windows	Bluetooth	Yes
macOS	Bluetooth	Yes

Source3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Exact Android, iPhone, Windows 10/8.1 and Mac setup chapters. Page 93 video-call instructions explicitly select HFP/HSP calling connections for speakers and microphone. No gaming-console support inferred.

BTOZO A1

Not available

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

ASony WF-1000XM4

Feature	Needs
360 Reality Audio personalization	Compatible Android/iPhone, companion app ear-shape analysis, supported content and a compatible streaming service. Subscription and regional availability may apply.
LDAC	Compatible LDAC source and Priority on sound quality in companion app. iPhone Bluetooth music uses AAC instead.
Two-device multipoint	Updated firmware and companion app Connect to 2 devices simultaneously enabled. It routes one audio stream at a time.

Source9Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026Original launch footnotes 2, 4 and 5 and current exact manual pages 69-70/84/106 independently establish each requirement. Later app name changes do not imply a later hardware model.

BTOZO A1

Not available

Official licence

Not available

Not available

Battery and charging

11 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

40mAh1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Battery capacity: 40 mAh for the earphones. The case label in the product photo reads 40 mAh, 3.7 V, 0.148 Wh. Whether the figure is one earbud or the pair is not stated. NerdTechy says each earbud has a 40 mAh battery.

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.

ASony WF-1000XM4

Mode	Codec	Includes case recharges	Hours (h)
ANC on	LDAC	No	5
ANC off	LDAC	No	6
Transparency	LDAC	No	4.5
ANC on	AAC	No	8
ANC off	AAC	No	12
Transparency	AAC	No	8
ANC on	SBC	No	7.5
ANC off	SBC	No	11
Transparency	SBC	No	7
ANC on	AAC	Yes	24
ANC off	AAC	Yes	36
Call	Not available	No	6

Source1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 20263Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 20264Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Pages 27-28 music rows with DSEE Extreme OFF. ANC off also means Ambient Sound off. DSEE AUTO shortens LDAC ANC/on,off,ambient to 3.5/4/3.5 h, AAC to 6/8/6 h and SBC to 5.5/7/5.5 h. AUTO alternatives are noted rather than merged into indistinguishable rows. Volume and firmware unstated. Japanese maker footnote explicitly supplies AAC and DSEE/EQ off for case-inclusive 24 h ANC on and 36 h off. Case totals include earbuds. Call maximum 6 h with ANC/Ambient off and codec unstated. Other call modes: 5.5 h ANC on, 5 h Ambient on. No unsupported call ANC column added.

BTOZO A1

Mode	Codec	Includes case recharges	Hours (h)
ANC off	AAC	No	7
ANC off	AAC	Yes	32

Source1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Music play time (AAC, default setting, 50% volume): 7 h on a single charge and 32 h with the charging case. An archived store page from 6 December 2023 gave 5.5 h and 22 h for the same hardware figures, so the claim changed over time. The current claim is stored.

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

12h=CalculatedFrom Claimed battery life

7h=CalculatedFrom Claimed battery life

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

8h=CalculatedFrom Claimed battery life

Not available

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

12h=CalculatedFrom Claimed battery life

7h=CalculatedFrom Claimed battery life

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

36h=CalculatedFrom Claimed battery life

32h=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

Not available

Talk time (claimed)

6h=CalculatedFrom Claimed battery life

Not available

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

90min3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Manual page 24 defines empty-to-full charging. Earbuds fully charge in approximately 1.5 h from a previously charged case. Approximately 3 h refers to charging both headset and case together over USB. Page 25 recommends ambient 15 to 35 C. Page 143 corroborates the technical durations. These are claims, not measured values.

120min1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Cable charge time: 2 h for the earphones. The page does not say how the earbuds are charged, so the earbud time is read as charging in the case.

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

Not available

Not available

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

5min3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Not available

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.

1h1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 20263Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Page 27 about 1 h playback after 5 min charging. Exact maker Japanese page footnote qualifies AAC, ANC on, DSEE/EQ off and other features at default.

Not available

Charging case

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

Not available

400mAh1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Battery capacity: 400 mAh for the charging 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-C3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

USB-C1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Charging port: USB Type-C.

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.

180min3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Manual page 24 approximately 3 h empty-to-full USB charging with earbuds installed and charging simultaneously. Page 143 separately labels charging case approximately 3 h. No faster empty-case-only or Qi duration inferred. Recommended ambient 15 to 35 C on page 25.

120min1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Cable charge time: 2 h for the charging case.

Wireless charging

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

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

Qi5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026

Not available

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

Not available

Not available

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

Not available

Not available

Screen on case

Not available

Not available

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

Not available

Not available

Controls

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

Touch, Voice commands3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Touch1Maker product pagetozostore.com/products/a1Read 15 October 2026Feature heading: Smart Touch Control. The quick guide lists tap and tap-and-hold gestures on the earbuds.10Reviewnerdtechy.com/tozo-a1-reviewRead 15 October 2026Controls section: touch-activated controls on the exterior of each earbud.

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

Touch3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Pages 21-22 permit assigning playback volume adjustment to touch sensors. Factory touch functions and assistant assignment affect availability.

Touch10Reviewnerdtechy.com/tozo-a1-reviewRead 15 October 2026Controls section: touch-activated controls adjust the volume, skip or go back a track and play or pause through finger taps.

Gestures

Single tap, Double tap, Triple tap, Touch and hold3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Tap once on either earbud: play or pause, answer a call, Double tap the left earbud: previous track, Double tap the right earbud: next track, Hold the right earbud for 2 seconds: volume up, Hold the left earbud for 2 seconds: volume down, Hold either earbud for 2 seconds: hang up or reject a call, Triple tap either earbud: wake the voice assistant3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Section 3.0 and 4.0. Hold means press and hold for 2 seconds. Tap once on L or R plays or pauses. Double tap L is previous and double tap R is next. Hold R raises and hold L lowers the volume. A call is answered with one tap and ended or rejected with a 2 second hold.

Remappable controls

Yes3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Yes3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Section 8.0: most of the controls can be customized in the TOZO app.

Voice assistant

Google Assistant, Amazon Alexa, Siri3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 20265Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Google Assistant/Alexa explicitly original launch, with supported language/region and app setup requirements. Siri activation is touch-controlled in manual pages 104-105, not hands-free Hey Siri.

Voice assistant3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Section 5.0: triple-tap the earbud to wake the voice assistant with a beep. No assistant is named.

Sensors and health

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In-ear detection

Yes3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Pages 17-18 explicitly IR sensing and pause/resume on removing/replacing either earbud.

Not available

Sensors

Infrared wearing sensor, Bone conduction voice sensor3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026IR wearing sensor explicit in manual. Dedicated bone-conduction speech pickup sensor separately explicit in original maker release, not a speech-detecting accelerometer.

Not available

Heart rate sensor

Not available

Not available

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

Not available

Not available

Hearing aid featureiAmplification for mild to moderate hearing loss

Not available

Not available

Medical clearances

Not available

Not available

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

Not available

Not available

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Not available

Not available

Fit and durability

4 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, L3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Not available

Ear tip materials

Foam3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Page 9 and maintenance chapters explicitly polyurethane foam. No silicone tip material inferred from siblings.

Silicone5Retailer pagebestbuy.com/product/tozo-a1-wireless-earbuds-bluetooth-5-3-lightweight-ipx5-2-mic-ai-calls-premium-sound-bass-32-eqs-charging-case-black/CZT87XXGG7Read 21 October 2026Maker account answer in the Q and A: the A1 set includes three spare silicone ear tips in three different sizes. The sizes are not named, so no ear tip sizes are stored.10Reviewnerdtechy.com/tozo-a1-reviewRead 15 October 2026Review: silicone ear tips. The maker answer on Best Buy also says silicone ear tips.

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

Not available

Not available

Ear tip fit test

Yes5Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Original app measures acoustic seal with supplied Noise Isolation tips. This is not a hearing assessment.

Not available

Dust and water rating, buds

IPX43Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 20265Press releasesony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-CancellationRead 5 October 2026Earbuds only. Launch footnote 12 excludes sound conduit, vents and two microphone holes per unit from protection scope and states case is not water resistant.

IPX51Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Water resistance - earphone: IPX5. No rating is stated for the case.

Dust and water rating, case

Not available

Not available

Water resistance depth

Not available

Not available

Software

3 of 6 differ

Companion app

Sony | Sound Connect1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026Current maker feature 5 names Sony Sound Connect. Original manual and launch use its former name Sony | Headphones Connect.7Maker product pagesony.jp/headphone/products/WF-1000XM4/feature_5.htmlRead 5 October 2026Exact current maker feature page names Sony Sound Connect. This replaces the former Sony | Headphones Connect name used in the original manual.

TOZO app1Maker product pagetozostore.com/products/a1Read 15 October 2026The TOZO app has 32 preset EQs and access to over 2,000 personalized EQs shared by other users. No app platform list is stated on the page.

App platforms

Android, iOS3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Page 108 explicitly Google Play and Apple App Store. No desktop companion app inferred.

iOS, Android3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Section 9.0 shows the App Store and Google Play badges.

User firmware updates

Yes3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026

Yes3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Section 8.0: the earbuds firmware can be updated in the app.

Finding network

Last location in the app8Maker spec sheet (PDF)sony.com.my/microsite/MDR/SONY_WF1000XM4.pdfRead 5 October 2026Page 10 explicitly Google Find My Device last known smartphone location and nearby tone. No crowd-based offline Find Hub network or UWB precision-finding claim.

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.

7.3g(0.3 oz)2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026Approximate mass of one earbud, corroborated by manual page 143 as 7.3 g x2 with M tips attached.

3.7g(0.1 oz)1Maker product pagetozostore.com/products/a1Read 15 October 2026Tech specs row Weight (each ear): 3.7 g plus or minus 0.2 g.

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.

41g(1.4 oz)2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026Approximate empty charging-case mass, separately listed on manual page 143.

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

3 of 3 differ

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

Hi-Res Audio Wireless6Maker product pagesony.jp/headphone/products/WF-1000XM4/feature_1.htmlRead 5 October 2026Hi-Res Audio Wireless logo on exact maker page and LDAC conditions. DSEE upscaling to 96 kHz/24 bit and V1 24-bit internal processing do not establish maximum accepted digital input resolution.

Not available

Communication certifications

Not available

FCC Part 15, ISED licence-exempt RSS, CE RED 2014/53/EU, ANATEL 0034822131433Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Sections 11.0 to 13.0: FCC Part 15 statement, ISED licence-exempt RSS statement and CE-DOC under Directive 2014/53/EU. No FCC ID is printed in the manual.4Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026Item details External Testing Certification: ANATEL 003482213143, model A1 (Brazil).

FCC IDs

Not available

2ASWH-A1-19E, 2ASWH-A1-AB6Regulatory filingfccid.io/2ASWH-A1-19ERead 21 October 2026Two FCC grants to Shenzhen Worgo Technology Limited (the TOZO maker, grantee code 2ASWH), both for trade mark TOZO, model A1: 2ASWH-A1-19E (granted 2026-06-02, light buds in the photos, Classic Bluetooth GFSK, pi/4 DQPSK and 8DPSK) and 2ASWH-A1-AB (filed 2026-06-04, black buds in the photos, same model and radio). The 19E filing photos show earbud cells labelled ST 501012, 3.7V, 0.15Wh, about 40 mAh, which fits the 40 mAh store figure. Grants for the 2021 and 2023 hardware were not found under this grantee, so these IDs describe the current A1 hardware only. The mapping of each ID to a colour is not stated.7Regulatory filingfccid.io/2ASWH-A1-ABRead 21 October 2026Second filing, ID 2ASWH-A1-AB, model A1, test report DLE-260424034R. Same note as the 2ASWH-A1-19E filing.

Other certifications

360 Reality Audio certified6Maker product pagesony.jp/headphone/products/WF-1000XM4/feature_1.htmlRead 5 October 2026

Not available

In the box

2 of 2 differ

In the box

WF-1000XM4 earbuds, Charging case, Noise isolation ear tips (S, M, L pairs), USB-A to USB-C cable, Documentation1Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 20263Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Page 8 publishes cable, case and three pairs of EP-NI1000 tips. M pair fitted, not an extra pair. Japanese maker page explicitly includes instruction manual and warranty documentation.

TOZO A1 Mini wireless earbuds, Charging case, Silicone ear tips, USB-A to USB-C charging cable, User manual4Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026What is in the box: Charging Case, Eartip, TOZO A1 Mini Wireless Earbuds, USB-C (A to C) cable, User Manual. The cable length is printed as 20 cm here while TOZO prints 20 inches for its Open EarRing box, so no length is stored.10Reviewnerdtechy.com/tozo-a1-reviewRead 15 October 2026Review: a charging case, two earbuds, a USB-C charging cable and silicone tips. Amazon listing (the maker brand store) adds the user manual.

Cables included

ASony WF-1000XM4

Type	Length (m)	Count
USB-A to USB-C cable	0.2	1

Source3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Page 8 states one supplied cable, approximately 20 cm.

BTOZO A1

Type	Count
USB-A to USB-C	1

Source4Retailer pageamazon.com/dp/B09N3RYJ66Read 21 October 2026What is in the box: USB-C (A to C) cable. Length not stored because of the cm and inch mismatch noted under in_the_box.

Links

Not compared

Product page

www.sony.jp/headphone/products/WF-1000XM41Maker product pagesony.jp/headphone/products/WF-1000XM4Read 5 October 2026

www.tozostore.com/products/a11Maker product pagetozostore.com/products/a1Read 15 October 2026TOZO official store page, titled TOZO A1 Mini Wireless Earbuds.

Spec sheet

www.sony.jp/headphone/products/WF-1000XM4/spec.html2Maker product pagesony.jp/headphone/products/WF-1000XM4/spec.htmlRead 5 October 2026

Not available

Manual

helpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdf3Owner's manualhelpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdfRead 5 October 2026Original exact YY2948 Help Guide, 144 pages, revision 5-027-983-11(6). Technical tables, package, controls, charging, calls and updated multipoint chapters read. Later software capabilities are qualified separately from launch.

s3-us.tozostore.com/tozo/pdfRenderer/web/index.html3Owner's manuals3-us.tozostore.com/tozo/pdfRenderer/web/index.htmlRead 21 October 2026Manual listed on the TOZO manuals page for the A1 (PDF created 2024-08-24, six languages). The text is outlined, so it was read from page images. The same gestures and app text appear in the A1 2024 manual that Amazon hosts.

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.

Not available

1year2Maker product pagetozostore.com/pages/warranty-policyRead 21 October 2026TOZO US warranty policy: one-year limited warranty against manufacturing defects from the date of purchase. The store banner says 12+6 months and the A1 quick guide offers an 18-month extended warranty when the product is registered within 14 days. The 12-month base term is stored.

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