Earbuds / Compare

soundcore Liberty 4 Pro vs TOZO NC9 (2024 Hybrid ANC)

A

Product A: soundcore

Liberty 4 Pro

86 of 166 known

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B

Product B: TOZO

NC9 (2024 Hybrid ANC)

54 of 166 known

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All 166 fields

Every value links to where we found it.

Only differences

Asoundcore Liberty 4 Pro

BTOZO NC9 (2024 Hybrid ANC)

General

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Series

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

A3954, A3954ZF1, A3954Z21, A3954ZG14Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds.jsRead 20 October 2026

T111241Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Charging case label in the maker's product photo: Model No. T11124. The earbud label reads Model Name NC9.

GTIN / EAN

194644297237, 194644297206, 1946442074344Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds.jsRead 20 October 2026US store barcodes per colour. The EU store uses the same barcodes for its own SKU names.

6971681319931, 6971681312338, 6971681312352, 69716813123691Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Variant barcodes of the store page. Black and Grey list the same barcode. The Pink, Green and Dusty Blue entries are not valid 13-digit barcodes and are left out.

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

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Status

Available4Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds.jsRead 20 October 2026The US store lists all three colours as available on the access date.

Available1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026In stock on the TOZO store 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.

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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.

soundcore Liberty 5 Pro11Press articlephileweb.com/sp/news/d-av/202605/27/65209.htmlRead 23 October 2026PhileWeb's launch report names the Liberty 4 Pro as the previous model of the Liberty 5 Pro series.12Press articleexpertreviews.co.uk/technology/headphones-audio/soundcore-liberty-5-pro-reviewRead 23 October 2026Expert Reviews names the Liberty 4 Pro as a predecessor of the Liberty 5 Pro.

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

$129.997Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026Spec box price $129.99. Digital Trends and Mezha also report $130 and $129 at launch. The maker's US store now lists $149.99.

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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

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

US, GB, EU, JP4Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds.jsRead 20 October 2026Also sold through the UK, EU and Japan stores of the maker.

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ColoursiThe maker's own colour names

Glossy Black, Pearl White, Blue4Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds.jsRead 20 October 2026US store lists Glossy Black, Pearl White and BIue, with a typo in the last name. Stored as Blue. Anker Japan sells Midnight Black, Pearl White, Sky Blue and Deep Green under other SKUs, and the EU store lists more colours.

Black, Dark Blue, Matte Red, Pink, Green, Dusty Blue, White, Grey1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Colour picker: Black, Dark Blue, Matte Red, Pink, Green, Dusty Blue, White, Grey.

Segment

Music3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026

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Design

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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-ear3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026

In-ear1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Product tags: In-Ear. The photos show a sealed ear tip.

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

Stem3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026Stemmed earbuds with a control area on the stem.

Stemless4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: stemless, round earbuds with a drip shape that points down in the ear.

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

Either bud1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Either bud6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 5.2 Wearing One Earbud gives controls for L and R alone. Section 5.4: ANC is not available when using a single earbud. Both earbuds can play alone.

RGB lighting

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Drivers and sound

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

Asoundcore Liberty 4 Pro

Type	Role	Diameter (mm)	Count per earbud
Dynamic	Woofer	10.5	1
Dynamic	Tweeter	4.6	1

Source1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table lists 10.5mm and 4.6mm dynamic drivers. The US page calls the second a titanium-coated tweeter and Anker Japan names the 10.5 mm driver for bass and the 4.6 mm driver for mid and high range. One of each per earbud.

BTOZO NC9 (2024 Hybrid ANC)

Type	Diameter (mm)
Dynamic	10

Source2Maker product pagetozostore.com/blogs/news/why-tozo-nc9-is-one-of-the-most-popular-tozo-wireless-earbudsRead 15 October 2026Maker blog post: 10 mm dynamic drivers with OrigX Acoustic 2.0 tuning. The post links to this product. A TOZO spec table and two reviews give 9 mm or 9.2 mm. No driver count or role is stated.

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

Dynamic1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Dynamic2Maker product pagetozostore.com/blogs/news/why-tozo-nc9-is-one-of-the-most-popular-tozo-wireless-earbudsRead 15 October 2026Maker blog post: 10 mm dynamic drivers.

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

10.5mm=CalculatedFrom Drivers per bud

10mm=CalculatedFrom Drivers per bud

Drivers per budiTotal audio transducers in one earbud, summed from explicit driver quantities. A row with an unknown quantity makes the total unknown.

2=CalculatedFrom Drivers per bud

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Diaphragm material

Titanium-coated (tweeter)3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026US page names a titanium-coated tweeter next to the 10.5mm driver. Only the tweeter coating is stated.

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

Min14 HzMax40 kHz1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table prints 14Hz - 40kHz with no codec or conditions.

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Impedance

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

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Sensitivity reference

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

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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.

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

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Personalised soundiA profile from a hearing test or ear scan

Yes7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026

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Onboard EQ

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

87Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026Eight-band custom equalizer in the soundcore app. The app also has 22 presets.

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

Not available

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Volume limit

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Spatial audio

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

Spatial Audio (Music, Podcast, Movie and Game modes)1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Four Spatial Audio modes: Music, Podcast, Movie and Game. Spatial Audio is not supported when LDAC is on.

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

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Spatial Audio Music Mode offers head tracking or fixed. Podcast, Movie and Game modes are listed without head tracking.

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Noise cancelling

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Active noise cancelling

Yes3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026Seven sensors and real-time adaptive noise reduction that adapts every 0.3 seconds.

Yes1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Spec headline: Hybrid Active Noise Canceling.

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

Not available

Hybrid1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Page diagram: an out-facing microphone detects outside noise and an in-facing microphone listens inside the ear canal. Both are used for cancelling.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 6.1: an outward-facing microphone detects external sounds and anti-noise cancels them, and an inward-facing microphone listens for unwanted internal sounds. That is hybrid.

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.

69Press articlemezha.ua/en/2024/10/07/anker-soundcore-liberty-4-pro-is-presented-tws-headphones-with-anc-and-up-to-40-hours-of-battery-life-for-129/ampRead 20 October 2026Mezha describes seven sensors as six microphones and a barometer. Calls also use the six microphones.10Press articlemacerkopf.de/2025/01/07/anker-soundcore-liberty4-pro-ces2025Read 20 October 2026Six noise cancelling sensors plus a barometric pressure sensor for an airplane mode.

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

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Ambient Sound section: ANC levels 6 to 10 adapt to the ears and environment.

Yes1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Page image caption: ANC Adaptive Hybrid ANC. The adjustment conditions are not stated.

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

51Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026ANC is level 6 to 10, so 5 levels. Transparency is level 1 to 5. Normal sits between them.

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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

45dB1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026FAQ: noise reduction depth of up to 45 dB. No frequency or test conditions are stated.

Transparency mode

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Yes1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature text: Transparency Mode lets you hear ambient sounds.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 6.3 Transparency Mode.

Adjustable transparency

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Transparency is level 1 to 5 on the slider and in the app.

Not available

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

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Conversation detection

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Easy Chat lowers music volume and enables transparency while you talk, then returns to the ANC level after 5, 10 or 15 seconds of silence. ANC mode only.

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.

Yes3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026Six microphones, a noise cancelling algorithm and wind noise reduction technology for calls.

Yes1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026The app screenshot on the page shows a Reduce Wind Noise setting. This is a selectable setting, not a mesh or shape change.4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the app offers a wind noise ANC setting.

Measured

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

SoundGuys found the default sound follows its headphone preference curve closely across the mids and highs, with more emphasis on bass below 200 Hz.7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026Objective measurements section. SoundGuys compares the default sound with its headphone preference curve.

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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.

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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.

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

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

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

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

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

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

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

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

SoundGuys found voices clear in its ideal-conditions demo. In simulated office and street noise some background noise gets through while the voice stays in focus. Simulated wind and reverberant space were handled well. These are qualitative results.7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026SoundGuys microphone demos in ideal, office, street, windy and reverberant conditions. No numerical speech bandwidth or noise score is stored.

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

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

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

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

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

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

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

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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.

Asoundcore Liberty 4 Pro

ANC	Hours (h)
Yes	5.7

Source7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 20265 h 42 min with ANC enabled, stored as 5.7 h. One-week test of a maker-provided unit on earbud firmware 03.17, case firmware 02.56 and soundcore app 5.5.0. SoundGuys plays real music peaking at 75 dBSPL. Codec and host are not stated.

BTOZO NC9 (2024 Hybrid ANC)

Not available

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

5.7h=CalculatedFrom Battery life (measured)

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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

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

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

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Microphones and calls

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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.

63Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 20266-Mic AI Clear Calls.

61Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature Call Noise Reduction: six-mic ENC noise reduction. FAQ: 6 built-in microphones and ENC ambient noise reduction. All six are named for call noise reduction, so the voice count equals the total. The manual shows a Noise Canceling MIC and a MIC on each 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.

65Maker product pageankerjapan.com/products/a3954Read 20 October 2026Six microphones are used for call noise removal and the seven sensors for ANC include a new barometric sensor, so six microphones in total.

61Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026FAQ: 6 built-in microphones. Counted across both earbuds. How they split between ANC and calls is not stated.

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.

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Mic noise reduction

AI3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026

DSP1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature and FAQ: ENC ambient noise reduction for calls. ENC is a processing feature, so dsp is stored, as on the TOZO T6. No AI processing is claimed.

Call audio bandwidthiHighest supported call-audio bandwidth. Compatible phone, operating system, call app or network requirements belong in the source note.

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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

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SidetoneiHear your own voice in calls

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Connectivity

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Chip

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Connections

Bluetooth1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Bluetooth1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Bluetooth 5.3 is the only connection named.

Bluetooth

5.31Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

5.31Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature text: Bluetooth 5.3.

Bluetooth codecs

SBC, AAC, LDAC5Maker product pageankerjapan.com/products/a3954Read 20 October 2026Comparison table lists SBC / AAC / LDAC.

SBC, AAC4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review spec list: Bluetooth 5.3 with AAC codec. SBC comes from the HiFi Report page. The maker states no codecs.5Reviewhifireport.com/tozo-nc9-hybrid-active-noise-cancelling-wireless-earbuds-reviewRead 15 October 2026The page says Bluetooth 5.3 supports the standard SBC and AAC codecs.

Bluetooth profiles

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LE Audio

Not available

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Auracast

Not available

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MultipointiConcurrent Bluetooth connections to multiple source devices. Pairing memory and switching through a manufacturer account alone do not qualify.

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

No4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the NC9 2024 does not support multipoint. Only one device can be connected at a time.

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

25Maker product pageankerjapan.com/products/a3954Read 20 October 2026Multipoint connects to two devices at the same time.

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Multipoint with LDACiMany buds turn multipoint off on LDAC

No1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026LDAC section says that with two devices connected the app warns that LDAC is not supported. The Anker Japan comparison table says LDAC can be used with multipoint. The manual is kept.

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

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Automatic switching between own devicesiThrough the maker's account

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Fast pairing

Google Fast Pair1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

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Audio sharingiShare one stream with a second pair

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Wireless range (claimed)

10m1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

15m1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026FAQ: stable connection within a 15-meter range. A reviewer measured reliable use to about 10 m.

Wireless receiveri2.4 GHz dongle

Not available

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Receiver connector

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

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Latency

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Low latency mode

Not available

Yes1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature text: Low-Latency Mode for gaming and video. No latency figure is stated.

Claimed latency

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Lowest claimed latency

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Compatibility

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

Android, iOS, Windows, macOS7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026Reviewer used the earbuds with an iPhone 15 Pro, notes LDAC needs a compatible Android phone and lists computer audio setup in the maker FAQ.

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

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

Asoundcore Liberty 4 Pro

Feature	Needs
LDAC	Android 8.0 or later, enabled as Preferred audio quality in the soundcore app. Not available while connected to two devices. Spatial Audio is off while LDAC is on. LDAC raises power use and shortens playtime.
Google Fast Pair	Android 6.0 or later.
Head tracking	Spatial Audio Music mode set to head tracking in the soundcore app. Fixed mode has no head tracking.
Easy Chat	Enable in the soundcore app. Available only in ANC mode.
Touch bar menu	The case menu shows only Ambient Sound by default. Add Spatial Audio, Atmospheric, Find Device and Remote Camera in the soundcore app.

Source1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

BTOZO NC9 (2024 Hybrid ANC)

Not available

Official licence

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Battery and charging

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

56mAh1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table lists Earbuds 56mAh x 2 and Charging Case 580mAh. Stored per earbud. Typical or rated is not stated.

55mAh1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Earbud label in the maker's product photo: 55 mAh 3.7 V, rated.

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.

Asoundcore Liberty 4 Pro

Mode	Includes case recharges	Hours (h)
ANC off	No	10
ANC off	Yes	40
ANC on	No	7.5
ANC on	Yes	30
Transparency	No	7.5
Transparency	Yes	30
Call	No	4.5

Source1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table: ANC off up to 10 h and 40 h with case, ANC on up to 7.5 h and 30 h. Anker FAQ test was at default settings, normal mode and 50 percent volume. LDAC increases power use and reduces playtime.2Maker product pageservice.soundcore.com/article-description/Different-Playtimes-of-soundcore-Liberty-4-Pro-from-a-Single-Charge-With-the-Charging-CaseRead 20 October 2026Maker FAQ: ANC 7.5 h and 30 h with case, normal 10 h and 40 h, transparency 7.5 h and 30 h. Calls 4 h with ANC, 4.5 h in normal mode and 4 h with transparency. The call row stores the normal-mode 4.5 h. Tested in the Anker laboratory at default settings, normal mode and 50 percent volume.

BTOZO NC9 (2024 Hybrid ANC)

Mode	Includes case recharges	Hours (h)
ANC off	No	14
ANC on	No	10
ANC off	Yes	59
ANC on	Yes	42

Source1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026FAQ: up to 14 h per charge with ANC off and 10 h with ANC on. The case gives up to 59 h with ANC off and 42 h with ANC on. The page headline says 60 hours, the badge says 59 hours and one image says 60 h and 40 h. The FAQ pair was used. No codec or volume is stated.

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.

10h=CalculatedFrom Claimed battery life

14h=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.

7.5h=CalculatedFrom Claimed battery life

10h=CalculatedFrom Claimed battery life

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

10h=CalculatedFrom Claimed battery life

14h=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.

40h=CalculatedFrom Claimed battery life

59h=CalculatedFrom Claimed battery life

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

30h=CalculatedFrom Claimed battery life

42h=CalculatedFrom Claimed battery life

Talk time (claimed)

4.5h=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.

40min1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table says charging time for earbuds up to 40 minutes. SoundGuys lists 45 minutes.

Not available

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.

The manual gives up to 40 minutes for the earbuds. An empty case takes 2.5 hours by cable and 3.5 hours wirelessly. Case input is 5 V 1 A. The case stops charging the earbuds when its battery drops below 20 percent. Dry the earbuds and the USB-C port before charging.1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

The manual says the power delivered by the charger must be between 2.5 W and 5.0 W to reach the maximum charging speed.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Last page: the power delivered by the charger must be between min 2.5 W required by the radio equipment and max 5.0 W to achieve the maximum charging speed.

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

5min1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 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.

4h1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Charging section says a 5-minute charge of the earbuds gives 4 hours of playtime. ANC, volume and codec are not stated.

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.

580mAh1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table lists Charging Case 580mAh. Typical or rated is not stated.

500mAh1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Charging case label in the maker's product photo: 500 mAh 3.7 V, rated.

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-C1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

USB-C4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the case charges by USB-C. The case photo on the maker page shows a USB-C port.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 1.0: USB C port on the charging case, next to a Reset button.

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.

150min1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Charging section says recharging the case with the earbuds removed takes 2.5 hours by cable and 3.5 hours by wireless charging.

120min5Reviewhifireport.com/tozo-nc9-hybrid-active-noise-cancelling-wireless-earbuds-reviewRead 15 October 2026Spec row: about 2 hours for a full case charge, by cable. The maker states no case charge time.

Wireless charging

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Charging section says to place the case at the centre of a wireless charger. No standard is named.

Not available

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.

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Reset section says a notification sound plays from the charging case. SoundGuys says the app can play a tone from either the earbuds or the case.7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026The Find Device section of the app plays a loud tone from either the earbuds or the charging case.

Not available

Screen on case

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Smart Display on the charging case with a touch bar.

Yes1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Page highlights: LED Digital Display and an HD display on the case. The display shows the battery percentage.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Sections 1.0 and 7.1: Display Screen on the case shows the battery level of the case and both earbuds.

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.

Pressure, Swipe1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Touch4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the sides of the earbuds are touch panels.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Sections 5.1 to 5.6 describe touch areas L and R. The charging case has a Reset button for resets.

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

Swipe1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Touch4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: holding the earbuds changes the volume.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 5.1: hold L to lower and hold R to raise the volume while music plays.

Gestures

Squeeze once on either earbud: play or pause, or answer a call, Squeeze twice on the right earbud: next track, Squeeze twice on the left earbud: previous track, Tap and hold either earbud for 2 seconds: switch between ANC and transparency, or reject or end a call, Slide up on either earbud: volume up, Slide down on either earbud: volume down, Pinch both earbud stems for 3 seconds: pair a second device1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026Controls table for dual earbuds. Squeeze controls can be customised in the app. Using a single earbud, squeeze twice plays the next track and there is no previous-track gesture.

Tap right earbud: play or pause, Double-tap left earbud: previous song, Double-tap right earbud: next song, Hold left earbud: volume down, Hold right earbud: volume up, Tap left earbud: switch between transparency mode and ANC mode, Triple-tap left earbud: normal mode, Triple-tap right earbud: voice assistant, Tap either earbud when worn alone: play or pause, Triple-tap either earbud when worn alone: voice assistant, Tap either earbud on an incoming call: answer, Hold either earbud for 2 seconds on an incoming call: reject, Hold either earbud for 2 seconds while dialing: cancel the call4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Reviewer description of the default controls. The manual gives the left and right split and is used for the stored list.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Sections 5.1 to 5.5, wording shortened. Both earbuds: tap R play or pause, double-tap L or R previous or next, hold L or R volume down or up, tap L switches transparency and ANC, triple-tap L normal mode, triple-tap R voice assistant. One earbud: tap L or R play or pause, triple-tap L or R voice assistant. Calls: tap L or R answers, hold 2 s rejects or cancels.

Remappable controls

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Yes4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: about half of the controls can be changed in the app.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 8.0 TOZO App: most of the controls can be customized in the app.

Voice assistant

Not available

Phone voice assistant6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 5.5: triple-tap wakes up the voice assistant. No assistant is named, so it is the phone own assistant.

Sensors and health

3 of 9 differ

In-ear detection

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Not available

Sensors

Barometric pressure sensor5Maker product pageankerjapan.com/products/a3954Read 20 October 2026Seven sensors for ANC, with a new barometric pressure sensor that works when Airplane Mode is turned on in the soundcore app.9Press articlemezha.ua/en/2024/10/07/anker-soundcore-liberty-4-pro-is-presented-tws-headphones-with-anc-and-up-to-40-hours-of-battery-life-for-129/ampRead 20 October 2026Seven sensors including one barometer.10Press articlemacerkopf.de/2025/01/07/anker-soundcore-liberty4-pro-ces2025Read 20 October 2026Barometric pressure sensor for the airplane mode. The same article gives a 149.99 euro price at its January 2025 launch while other reports say 129.99, so no euro price is stored.

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.

Yes7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026HearID Sound Test creates an EQ preset for hearing differences. It is consumer sound personalization, not a medical test.

Not available

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Not available

Not available

Fit and durability

2 of 7 differ

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

XXS, XS, S, M, L, XL1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

XXS, XS, S, M, L, XL1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026FAQ: six sizes of replaceable ear tips. The manual package diagram names the six sizes. Scarbir received 3 sets of ear tips, so the retail packs may differ.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 1.0 package diagram: XXS, XS, S, M, L and XL ear tips. M is pre-installed.

Ear tip materials

Not available

Not available

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

Not available

Not available

Ear tip fit test

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Not available

Dust and water rating, buds

IP551Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026SPECS table lists IP55 for the earbuds. SoundGuys and press list IPX5. Anker Japan says the case is not rated.

IPX81Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature text: IPX8 water resistance for the earbuds.

Dust and water rating, case

Not available

Not available

Water resistance depth

Not available

Not available

Software

3 of 6 differ

Companion app

soundcore1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

TOZO app1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Feature text: TOZO app with 32 preset EQs. A feature image also says TOZO Headphones app.

App platforms

Android, iOS1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

iOS, Android4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the Tozo app for iPhone and Android.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 9.0 shows App Store and Google Play badges.

User firmware updates

Yes1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026

Yes4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the app can update firmware.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 8.0: the earbuds firmware can be updated in the app.

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Yes4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: the app records and translates spoken sentences with the earbud or phone microphone. This is not a streaming interpreter.

Dimensions and weight

3 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.

5.5g(0.2 oz)7Measurementsoundguys.com/anker-soundcore-liberty-4-pro-review-125410Read 20 October 2026Spec box lists earbud 5.5 g and case 51 g. It does not say whether weighed by SoundGuys. Amazon US lists 62 g in total, which matches 2 x 5.5 g plus 51 g.

Not available

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.

51g(1.8 oz)8Retailer pageamazon.com/dp/B0DBHPZLCCRead 20 October 2026Amazon US detail table lists carrying case weight 51 g. SoundGuys also lists case 51 g in its review spec box and 52 g with case on its product page.

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.

Width62Height29.6Depth65mm(2.4 × 1.2 × 2.6 in)8Retailer pageamazon.com/dp/B0DBHPZLCCRead 20 October 2026Amazon US detail table labels carrying case length 6.5 cm, width 6.2 cm and height 29.6 mm. Length is stored as depth. SoundGuys lists 65 x 62 x 30 mm with no axis names.

Not available

Certifications

1 of 3 differ

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

Hi-Res Audio Wireless9Press articlemezha.ua/en/2024/10/07/anker-soundcore-liberty-4-pro-is-presented-tws-headphones-with-anc-and-up-to-40-hours-of-battery-life-for-129/ampRead 20 October 2026Mezha says the earbuds are Hi-Res Audio Wireless certified.10Press articlemacerkopf.de/2025/01/07/anker-soundcore-liberty4-pro-ces2025Read 20 October 2026Names the Hi-Res Audio Wireless standard.

Not available

Communication certifications

Not available

Not available

FCC IDs

2AOKB-A3954, 2AOKB-A3954L, 2AOKB-A3954R6Owner's manuallp.ankerjapan.com/hubfs/aoos/manual/A3954QSG.pdfRead 20 October 2026Quick Start Guide prints FCC ID 2AOKB-A3954 for the model A3954 and 2AOKB-A3954L and 2AOKB-A3954R for the left and right earbuds.

2ASWH-T111247Regulatory filingfccid.io/2ASWH-T11124Read 21 October 2026FCC grant 2ASWH-T11124, Wireless Earbuds, Shenzhen Worgo Technology Limited (TOZO), models T11124 and T11141, granted 2026-05-26. Its user manual is the TOZO NC9 manual. Grants 2ASWH-T11124E and 2ASWH-T11124C also name model T11124, but their manuals are for the TOZO NC9 Pro, so they are not stored.

Other certifications

Not available

Not available

In the box

2 of 2 differ

In the box

Earbuds, Charging case, Ear tips in six sizes (XXS, XS, S, M, L, XL), size M pre-installed, USB-C charging cable8Retailer pageamazon.com/dp/B0DBHPZLCCRead 20 October 2026Amazon US built-in media list: cable, charging case, XXS/XS/S/M/L/XL ear tips with size M pre-installed, and the earbuds.

Earbuds with M-size ear tips pre-installed, Charging case, USB-C cable, Extra ear tips, User manual, Quick guide4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: 3 sets of ear tips, USB-C cable, English manual. The stored list follows the maker manual.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 1.0: the package contains the NC9 earbuds preinstalled with M-size ear tips, a charging case, a USB-C cable, extra ear tips and instructions. The diagram shows a User Manual and a Quick Guide.

Cables included

Asoundcore Liberty 4 Pro

Not available

BTOZO NC9 (2024 Hybrid ANC)

Type	Count
USB-C	1

Source4Reviewscarbir.com/tws/tozo-nc9-2024-reviewRead 15 October 2026Review: USB-C cable. The other end is not stated.6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026Section 1.0 diagram shows one USB-C cable with a USB-A plug. No length is given.

Links

Not compared

Product page

us.soundcore.com/products/a3954-liberty-4-pro-tws-earbuds3Maker product pageus.soundcore.com/products/a3954-liberty-4-pro-tws-earbudsRead 20 October 2026

www.tozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbuds1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026TOZO official store page, titled TOZO NC9 Upgraded Wireless Earbuds. The URL slug says 2024-hybrid-active-noise-cancelling-wireless-earbuds. TOZO also sells an older NC9 (40 h, IPX6, wireless charging) on a different page. That model is not this one.

Spec sheet

Not available

Not available

Manual

salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdf1Owner's manualsalesforce-knowledge-download.s3.us-west-2.amazonaws.com/000021411/en_US/000021411.pdfRead 20 October 2026English user guide A3954, published in the service index on 2025-09-01.

fccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdf6Owner's manualfccid.io/2ASWH-T11124/User-Manual/User-manual-9328213.pdfRead 21 October 2026TOZO NC9 user manual, a copy filed with the FCC by Shenzhen Worgo Technology Limited (TOZO) under FCC ID 2ASWH-T11124. The cover says Model No.: T11124, which is the NC9 case label model. No manual PDF was found on the maker site.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

0 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1.5years8Retailer pageamazon.com/dp/B0DBHPZLCCRead 20 October 2026Amazon US listing says 18 months warranty.

1.5years1Maker product pagetozostore.com/products/2024-hybrid-active-noise-cancelling-wireless-earbudsRead 15 October 2026Store banner: 12+6 months hassle-free warranty. Stored as 1.5 years for the TOZO US store.

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