Earbuds / Compare

soundcore V20i vs TOZO Open EarRing

A

Product A: soundcore

V20i

60 of 166 known

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B

Product B: TOZO

Open EarRing

44 of 166 known

Change TOZO Open EarRing

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All 166 fields

Every value links to where we found it.

Only differences

Asoundcore V20i

BTOZO Open EarRing

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.

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

T130644Retailer pageamazon.com/dp/B0DHVFGGGRRead 21 October 2026Item details Model Number: T13064 on the Khaki and Pink listings (ASINs B0DHVFGGGR and B0DHVGWM65). Mfr Part Numbers T1308 (Khaki) and T1307 (Pink) differ by colour and are not stored. The same item details list impedance 32 ohm, driver 10 mm, Bluetooth range 20 m and latency 60 ms, which conflict with the maker page or repeat the values on TOZO A1 listings, so no other value is taken from that listing.5Regulatory filingfccid.io/giteki/220-JP8106Read 21 October 2026Japan Giteki certificate 220-JP8106 of 2024-09-26 to Shenzhen Worgo Technology Co., Ltd. lists T13064 with nine other T13 model numbers, so T13064 is a real TOZO model code. The certificate does not name the product and fits the October 2024 launch.

GTIN / EAN

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

717470228833, 717470228956, 7174702289706Maker product pagetozostore.com/products/openearring-headphone.jsonRead 20 October 2026Barcodes of the three store variants: Black 717470228833, Khaki 717470228956 and Rose Gold 717470228970. The check digits are valid.

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

Not available

Not available

Status

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

Available1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026In stock on the TOZO store on 2026-10-20 at 49.99 USD.

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

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.

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

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

Not available

ColoursiThe maker's own colour names

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

Black, Khaki, Rose Gold1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Colour picker and variants of the store feed: Black, Khaki and Rose Gold. The spec table and older images say Pink. The Rose Gold images were added to the page in September 2025, so Pink is read as the earlier name.

Segment

Not available

Not available

Design

3 of 4 differ

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

Open-ear1Maker product pageankerjapan.com/products/a3876Read 15 October 2026

Open-ear1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Type: Open-ear. The earbud sits outside the ear canal.

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

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

Clip1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Page tagline: Open Ear Clip Wireless Headphones. Page text: open the C-shaped strip and clip the earbuds onto your ears.7Maker product pagetozostore.com/blogs/news/tozo-openwear-vs-tozo-open-earring-which-open-ear-fits-you-bestRead 20 October 2026Maker blog post: the Open EarRing uses a clip-on style design that rests on the ear without entering the ear canal.

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

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

Not available

RGB lighting

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

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.

Asoundcore V20i

Type	Diameter (mm)	Count per earbud
Dynamic	16	1

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

BTOZO Open EarRing

Type	Diameter (mm)	Count per earbud
Dynamic	12	1

Source1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Driver: 12mm dynamic driver. One driver per earbud is read from the singular spec row.7Maker product pagetozostore.com/blogs/news/tozo-openwear-vs-tozo-open-earring-which-open-ear-fits-you-bestRead 20 October 2026Maker comparison table: 12mm dynamic drivers.

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

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

Dynamic1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Driver: 12mm dynamic driver.

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

16mm=CalculatedFrom Drivers per bud

12mm=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

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

Not available

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

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

Min20 HzMax20 kHz1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Frequency response range: 20Hz-20kHz. No conditions are stated.

Impedance

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

Not available

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

Not available

Not available

Sensitivity reference

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Personalised soundiA profile from a hearing test or ear scan

Not available

Not available

Onboard EQ

Not available

Not available

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

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

None of 2 known

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

Not available

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

0 of 11 differ

Active noise cancelling

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

No1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Noise cancellation lists only ENC call noise reduction. The earbuds are open-ear and the page promotes awareness of surroundings.

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

Not available

Not available

ANC microphones in both earbudsiPhysical microphones used by ANC across the pair. A shared call and ANC microphone counts once. Case microphones and vibration sensors are excluded.

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Transparency mode

Not available

Not available

Adjustable transparency

Not available

Not available

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

Not available

Not available

Conversation detection

Not available

Not available

Wind noise reductioniA documented physical design or processing feature for reducing wind noise. The source note distinguishes mesh or shape changes from selectable processing.

Not available

Not available

Measured

None of 23 known

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

Not available

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

Not available

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.

Not available

Not available

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

Not available

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

3 of 7 differ

Voice microphones in both earbudsiPhysical call and beamforming microphones across the pair. Excludes case microphones and vibration sensors. Shared ANC microphones can also count here when used for calls.

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

Not available

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.

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

Not available

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

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

DSP1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Call noise cancellation: ENC call noise reduction. Read as digital signal processing, since no AI is named.

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

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

Bluetooth1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Bluetooth is the only connection named.

Bluetooth

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

5.41Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs and feature text: Bluetooth 5.4. The Oct 2024 Tech Outlook review and the Feb 2025 Gadgeteer spec table both say Bluetooth 5.3. The current maker pages and retailer titles say 5.4.

Bluetooth codecs

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

AAC, SBC1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Audio codec: AAC/SBC.

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.

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

Not available

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

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

Not available

Not available

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

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

15m1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Effective Bluetooth range: 15m. The Amazon listing item details say 20 meters. The maker page value is stored.

Wireless receiveri2.4 GHz dongle

Not available

Not available

Receiver connector

Not available

Not available

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

Not available

Not available

Latency

1 of 3 differ

Low latency mode

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

Not available

Claimed latency

Not available

Not available

Lowest claimed latency

Not available

Not available

Compatibility

1 of 4 differ

PlatformsiPlatforms with documented audio support. App availability and advanced features can be more limited. Edition-specific support is listed in variants.

Not available

Not available

Connection per platformiDocumented audio connection for each platform. USB-C phone routes require a compatible port. Platform edition and microphone restrictions belong in source notes or feature requirements.

Not available

Not available

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

Asoundcore V20i

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

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

BTOZO Open EarRing

Not available

Official licence

Not available

Not available

Battery and charging

9 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

60mAh1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Battery capacity: 60mAh (earphones). Rated capacity.

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.

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

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.

Asoundcore V20i

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

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

BTOZO Open EarRing

Mode	Codec	Includes case recharges	Hours (h)
ANC off	AAC	No	10
ANC off	AAC	Yes	40

Source1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs: music play time (AAC, default setting, 50% volume) 10h on a single charge and 40h with the charging case. The case total counts the earbuds plus case recharges. No ANC. The Gadgeteer says the case adds 30 h.7Maker product pagetozostore.com/blogs/news/tozo-openwear-vs-tozo-open-earring-which-open-ear-fits-you-bestRead 20 October 2026Maker comparison table: single charge playtime 10 hours and total playtime 40 hours.

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.

8h=CalculatedFrom Claimed battery life

10h=CalculatedFrom Claimed battery life

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

Not available

Not available

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

8h=CalculatedFrom Claimed battery life

10h=CalculatedFrom Claimed battery life

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

36h=CalculatedFrom Claimed battery life

40h=CalculatedFrom Claimed battery life

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

Not available

Not available

Talk time (claimed)

Not available

Not available

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

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

90min1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Cable charge time: 1.5h (earphones). Stored as 90 minutes. The maker labels it for the earphones and does not state the endpoints.

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.

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

Not available

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

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

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

Not available

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.

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

400mAh1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Battery capacity: 400mAh (charging case). Rated capacity.

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.

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

Not available

Case charging port

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

USB-C1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs 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.

Not available

120min1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Cable charge time: 2h (charging case). Stored as 120 minutes.

Wireless charging

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

No8Reviewthe-gadgeteer.comRead 20 October 2026Review of 2025-02-19 lists Add wireless charging under what needs to be improved, so the case has none.

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Screen on case

Not available

Yes1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Page: the smart LED display on the charging case shows real-time battery status.

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

1 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.

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

Touch8Reviewthe-gadgeteer.comRead 20 October 2026Review: touch controls on the larger bulb behind the ear.

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

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

Touch9Reviewthetechoutlook.com/reviews/gadgets-reviews/tozo-open-earring-review-affordable-and-comfortable-to-wear-all-day-longRead 20 October 2026Review: the touch controls cover playback, volume up and down, answering and rejecting calls. They are customisable in the app.

Gestures

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

Double tap either earbud: play or pause, Triple tap the left earbud: previous track, Triple tap the right earbud: next track, Double tap either earbud: answer a call, Double tap and hold either earbud: hang up a call, Triple tap either earbud: reject a call, Tap once, then hold for 2 seconds: voice assistant2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Sections 5.1 to 5.3. Defaults with both earbuds worn. The manual lists no volume gesture and the Gadgeteer review of 2025-02-19 says functions are assigned in the app, so these are the default assignments. Power on is a 3 second hold and power off is a tap and an 8 second hold.

Remappable controls

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

Yes2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Section 7.0: most of the controls can be customized in the app.8Reviewthe-gadgeteer.comRead 20 October 2026Review: in the app you can assign functions to each tap sequence for the left and right buds.9Reviewthetechoutlook.com/reviews/gadgets-reviews/tozo-open-earring-review-affordable-and-comfortable-to-wear-all-day-longRead 20 October 2026Review: the touch controls can be customised via the TOZO app.

Voice assistant

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

Voice assistant2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Section 5.3: tap once, then press and hold for 2 seconds. No assistant is named.

Sensors and health

None of 9 known

In-ear detection

Not available

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Sensors

Not available

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Heart rate sensor

Not available

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

Not available

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Hearing aid featureiAmplification for mild to moderate hearing loss

Not available

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Medical clearances

Not available

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

Not available

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Hearing protectioniLimits sudden loud sounds

Not available

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Health features

Not available

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Fit and durability

2 of 7 differ

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

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Ear tip materials

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

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

Not available

Ear tip fit test

Not available

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Dust and water rating, buds

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

IPX51Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Water resistance - earphone: IPX5.7Maker product pagetozostore.com/blogs/news/tozo-openwear-vs-tozo-open-earring-which-open-ear-fits-you-bestRead 20 October 2026Maker comparison table: IPX5.

Dust and water rating, case

Not available

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Water resistance depth

Not available

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Software

2 of 6 differ

Companion app

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

TOZO app1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Feature text: the TOZO app has 32 preset EQs and 2,000+ personalised EQs shared by other users.8Reviewthe-gadgeteer.comRead 20 October 2026Review: the app customises EQ settings, assigns touch controls and shows the battery of the buds.

App platforms

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

iOS, Android2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Section 8.0 shows the App Store and Google Play badges.8Reviewthe-gadgeteer.comRead 20 October 2026Review: the app is available in the Play Store and the App Store.

User firmware updates

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

Yes2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Section 7.0: the earbuds firmware can be updated in the app.9Reviewthetechoutlook.com/reviews/gadgets-reviews/tozo-open-earring-review-affordable-and-comfortable-to-wear-all-day-longRead 20 October 2026Review of 2024-10-27: the app settings check for OTA updates and the reviewer installed one for the Open EarRing.

Finding network

Not available

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Precision findingiUWB in the case

Not available

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Live translation

Not available

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Dimensions and weight

1 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.

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

5.1g(0.2 oz)1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Tech specs Weight (each ear): 5.1g (+/-0.2g). One FAQ answer says 5.6 g, which the Open Rhyme page also says, so the spec table value is used.

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

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

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Case dimensionsiCharging-case width, height and depth on explicitly identified source axes. Report conflicting axis labels rather than reorder a tuple by appearance.

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Certifications

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

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Communication certifications

Not available

FCC Part 15, ISED licence-exempt RSS, CE RED 2014/53/EU2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Sections 10.0 to 12.0: FCC Part 15 statement, ISED licence-exempt RSS statement and CE-DOC under Directive 2014/53/EU. No ID is printed.

FCC IDs

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

Not available

Other certifications

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In the box

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In the box

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

Open EarRing earbuds, Charging case, User manual and quick guide, USB-C (A to C) cable, 20 inches1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026What's in the box: Open EarRing Earbuds, Wireless Charging Case (a case for the wireless earbuds, since the case has no wireless charging), User Manual and Quick Guide, USB-C (A to C) cable (20 inch).

Cables included

Asoundcore V20i

Type	Count
USB-C	1

Source1Maker product pageankerjapan.com/products/a3876Read 15 October 2026One USB-C cable. The length is not stated.

BTOZO Open EarRing

Type	Length (m)	Count
USB-A to USB-C	0.508	1

Source1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026What's in the box: USB-C (A to C) cable, 20 inches. Stored as the exact conversion of 20 in to 0.508 m.

Links

Not compared

Product page

us.soundcore.com/products/soundcore-v20i4Maker product pageus.soundcore.com/products/soundcore-v20i.jsRead 15 October 2026Maker US store page.

www.tozostore.com/products/openearring-headphone1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026TOZO official store page for the Open EarRing. TOZO also sells the OpenWear, Open Buds and Open X2 Pro. They are separate products.

Spec sheet

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

Not available

Manual

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

m.media-amazon.com/images/I/C1sUN0sgNdL.pdf2Owner's manualm.media-amazon.com/images/I/C1sUN0sgNdL.pdfRead 21 October 2026Open EarRing user manual, English section (PDF created 2025-12-17, 12 pages). Linked from the TOZO brand listing on Amazon. The text of the PDF is outlined, so it was read from page images. The TOZO manuals page does not list the Open EarRing.

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

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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.

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

1year1Maker product pagetozostore.com/products/openearring-headphoneRead 20 October 2026Store banner: 12+6 months hassle-free warranty. The TOZO warranty policy page states a one-year limited warranty, so the 12-month base term is stored. The earlier value of 1.5 years counted the banner extension. Stored for the TOZO US store.3Maker product pagetozostore.com/pages/warranty-policyRead 21 October 2026TOZO US warranty policy: one-year limited warranty against manufacturing defects from the date of purchase for all authentic products.

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