Earbuds / Compare

EarFun Air Pro 4 vs OnePlus Buds 4

A

Product A: EarFun

Air Pro 4

91 of 166 known

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B

Product B: OnePlus

Buds 4

82 of 166 known

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All 166 fields

Every value links to where we found it.

Only differences

AEarFun Air Pro 4

BOnePlus Buds 4

General

4 of 8 differ

Series

Not available

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

TW600, TW600B, TW600GW, TW600E1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page SKUs TW600B Black, TW600GW Glossy White and TW600E Royal Blue. The manual and radio filings name the base model TW600.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Specification and compliance pages: product TW600. The FCC label lists TW600L and TW600R.

E513A4Owner's manualoneplus.com/content/dam/oneplus/2024/eu/store/safety_guide/OnePlus_Buds_4_Safety_Guide.pdfRead 8 October 2026Original maker Safety and Warranty booklet, English page 2, explicitly names OnePlus Buds 4 and E513A. Regulatory radio power and SAR do not establish audio specifications.

GTIN / EAN

Not available

Not available

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

Not available

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Status

Available1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Global store lists the Black, Glossy White and Royal Blue variants with Add to cart.

Available1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

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

Not available

OnePlus Buds 37Reviewtechradar.com/audio/earbuds-airpods/oneplus-buds-4-reviewRead 23 October 2026TechRadar's review says the OnePlus Buds 4 are the successors to last year's OnePlus Buds 3.

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.

$89.994Press articlesoundguys.com/earfun-unveils-air-pro-4-120881Read 15 October 2026MSRP $89.99. Excludes sales tax. The launch coupon price is not stored.

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.

€79.996Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026German test updated on 5 August 2024: regular price 79.99 EUR (UVP) with a launch promotion of 59.99 EUR. VAT is included as is usual for German retail prices. The promotion price is not stored.

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, DE6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026German launch price and the US price from SoundGuys.

Not available

ColoursiThe maker's own colour names

Black, Glossy White, Royal Blue1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Colour selector: Black, Glossy White and Royal Blue. Royal Blue came after launch. The Japanese launch report and SoundGuys list black and white only.

Storm Gray, Zen Green1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Segment

Music1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026The maker lists the product as flagship adaptive ANC earbuds. No maker category matches the enum exactly, so music is the closest option.

Music2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

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-ear1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: in-ear earbuds with ear tips and an ergonomic fit.

In-ear3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026

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

Stem1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Stem bud. The controls and microphones sit in the stem.

Stem3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026

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

Not available

Not available

RGB lighting

Not available

Not available

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.

AEarFun Air Pro 4

Type	Role	Diameter (mm)	Count per earbud
Dynamic	Full range	10	1

Source1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: 10 mm composite dynamic drivers. SoundGuys lists one driver per bud.

BOnePlus Buds 4

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

Source1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker explicitly publishes one 11 mm woofer and one 6 mm tweeter per earbud. Transducer technology is not explicitly stated in the selected source, so row type and driver_type remain unknown.

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

Dynamic1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026

Not available

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

10mm=CalculatedFrom Drivers per bud

11mm=CalculatedFrom Drivers per bud

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

1=CalculatedFrom Drivers per bud

2=CalculatedFrom Drivers per bud

Diaphragm material

Composite diaphragm1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: customised 10 mm composite diaphragm drivers. Verbatim material is composite.

Woofer: 30-layer ceramic-metal diaphragm. Tweeter: flat diaphragm.2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Maker illustrated driver descriptions explicitly assign ceramic-metal diaphragm to the woofer and flat diaphragm to the tweeter. Flat does not by itself establish planar-magnetic technology.

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

Not available

Min15 HzMax40 kHz1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker publishes acoustic Frequency Response of 15 Hz to 40 kHz. Test method and mode are not stated. LHDC sample rate is separate.

Impedance

Not available

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.

96kHz1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: aptX Adaptive lossless technology up to 24-bit and 96 kHz. This is the maker's wording. aptX Lossless itself is 44.1 kHz and 16-bit. LDAC reaches 96 kHz and 24-bit on a supported Android phone per the Japanese release.3Press articlephileweb.com/sp/news/d-av/202407/18/60758.htmlRead 15 October 2026LDAC supports up to 96 kHz and 24-bit. aptX Lossless is CD quality 44.1 kHz and 16-bit.

192kHz2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Maker LHDC 5.0 high-resolution claim: up to 192 kHz / 24-bit, up to 1 Mbps. It does not establish lossless transmission. Compatible LHDC Android host required. iOS native Bluetooth does not support LHDC.

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.

24bits1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Same maker wording as the sample rate: up to 24-bit and 96 kHz with aptX Adaptive or LDAC on supported sources.

24bits2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026LHDC 5.0 claim with the same compatible-host and app restrictions as the sample rate.

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

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: personalise your sound using Sound Personalization in the EarFun Audio app.

Yes2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

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.

101Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: 10-band built-in EQ in the EarFun Audio app.

62Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

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

Bass Boost 3, Bass Reducer 3, Treble Boost 3, Treble Reducer 35Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: 30 EQ presets plus a 10-band custom equaliser. Three strengths exist for each boost and reduce preset. The four strongest presets named in the review are stored. The other presets are not listed.

Balanced, Serenade, Bass Mode2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

Volume limit

Not available

Not available

Spatial audio

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

Not available

OnePlus 3D Audio2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Static OnePlus 3D Audio with the published Android/iOS app requirements. Head tracking is not inferred.

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

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Active noise cancelling

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: QuietSmart 3.0 adaptive noise cancellation up to 50 dB.

Yes1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

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

Hybrid1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Maker gallery image titled Adaptive Hybrid Active Noise Cancellation. A second gallery image labels a feedforward mic and a feedback mic in each bud.4Press articlesoundguys.com/earfun-unveils-air-pro-4-120881Read 15 October 2026Adaptive hybrid ANC with feedforward and feedback microphones.

Hybrid2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Maker identifies feed-forward and feed-back microphone roles in each earbud. Both microphone placements establish hybrid playback ANC, distinct from its adaptive algorithm.

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.

41Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Maker gallery diagram labels a feedforward mic, a feedback mic and a talk mic in each bud. That gives four ANC microphones across the pair. The talk mic is not an ANC microphone.

42Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Two ANC roles per earbud, feed-forward and feed-back, total four across the pair. The separate talk microphone is not added to this count.

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

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: QuietSmart 3.0 senses changes in ambient noise and how the earbuds are worn and adjusts the cancellation.

Yes1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

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

31Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: manual choice of three levels, high, normal and low. SoundGuys lists a Strong and a Balance mode on early firmware. The maker figure is used.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review on firmware 0.2.3 lists Strong ANC, Balance ANC, two adaptive modes and a wind mode. The maker lists three manual levels, which is stored.

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.

50dB1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page and gallery image: up to 50 dB. The frequency and test conditions are not stated.

55dB1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Up to 55 dB from OnePlus Test Laboratory. The separate maximum cancellation bandwidth is 5500 Hz. This is not an independently measured overall attenuation.

Transparency mode

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Ambient Sound modes.

Yes1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Adjustable transparency

Not available

Not available

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

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.

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026The maker FAQ and manual list Wind Noise Cancellation as an app setting. This is selectable processing, not a mesh or shape change.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026App feature list names Wind Noise Cancellation.

Not available

Measured

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

SoundGuys lab response closely follows its Headphone Preference Curve apart from a dip in the highs around 8 to 11 kHz. Bass below 500 Hz is louder with ANC on than with ANC off.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: the response closely follows the house curve with a dip in the highs around 8 to 11 kHz. Disabling ANC makes all frequencies below 500 Hz quieter. Firmware 0.2.3, EarFun app 20.1.1. The unit came from EarFun.

The measured default response has increased sub-bass below 100 Hz and otherwise closely follows the SoundGuys Headphone Preference Curve.5Measurementsoundguys.com/oneplus-buds-4-review-142159Read 8 October 2026Written Objective Measurements section describes the measured default curve and explicitly names its target. No numeric graph interpolation or MDAQS score is stored in acoustic deviation fields.

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

SoundGuys microphone demonstrations pick up the voice accurately in quiet conditions. The microphones are not ideal for calls in noisy environments.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: the microphones accurately pick up the voice in quiet environments and are not ideal for noisy ones. Ideal, office, street, windy and reverberant demonstrations were published.

Speech remains understandable in the published voice samples across several noise environments.5Measurementsoundguys.com/oneplus-buds-4-review-142159Read 8 October 2026Reviewer microphone demonstrations and written conclusions, not a maker call-noise claim. Firmware and codec are not specified.

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

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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.

AEarFun Air Pro 4

Hours (h)
8.73

Source5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review battery test: 8 hours 44 minutes, stored as 8.73 h. The review does not state ANC, codec or volume for the test, so no ANC or codec value is stored. The page lists 8.73 h. This is not case-inclusive runtime.

BOnePlus Buds 4

ANC	Hours (h)
Yes	5.52

Source5Measurementsoundguys.com/oneplus-buds-4-review-142159Read 8 October 2026Storm Gray reviewer unit supplied by the maker and tested for two weeks. ANC-on playback lasted 5 h 31 min, stored as 331/60 hours. Firmware, codec and numeric test level are not stated in the product review and remain unknown. This is one earbud charge, not case-inclusive runtime.

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

8.73h=CalculatedFrom Battery life (measured)

5.52h=CalculatedFrom Battery life (measured)

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

Not available

Not available

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

Not available

Not available

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

Not available

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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.

61Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: 6-mic system with an AI algorithm and cVc 8.0. The gallery diagram shows three microphones in each bud.3Press articlephileweb.com/sp/news/d-av/202407/18/60758.htmlRead 15 October 2026Three microphones per earbud for calls, with cVc 8.0 and AI voice pickup.6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026Three AI-supported microphones per side with cVc 8.0.

61Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker states three microphones per side and three-microphone AI calls. Six physical microphones across the pair, not three across the pair.

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

61Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Six across the pair, including the ANC microphones.

61Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker three microphones per side. The product page labels feed-forward, talk and feed-back roles.

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

AI1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: 6-mic AI algorithm with cVc 8.0.

AI1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

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

Not available

Not available

Mic mute controliAn earbud control that mutes the microphone during calls. Includes touch or pressure gestures and physical buttons. Phone/app-only controls do not qualify.

Not available

Not available

SidetoneiHear your own voice in calls

Not available

Not available

Connectivity

6 of 18 differ

Chip

Qualcomm QCC30911Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Qualcomm QCC3091 SoC.3Press articlephileweb.com/sp/news/d-av/202407/18/60758.htmlRead 15 October 2026Qualcomm QCC3091.

Not available

Connections

Bluetooth1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Bluetooth only.

Bluetooth1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Bluetooth

5.41Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: V5.4.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026English specifications: V5.4.

5.41Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Bluetooth codecs

SBC, AAC, aptX Adaptive, aptX Lossless, LDAC, LC31Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: aptX adaptive, LDAC, SBC and LC3. The page text adds aptX Lossless. AAC is not in the maker table and comes from SoundGuys and kopfhoerer.de.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: aptX Lossless, LDAC, AAC and SBC with Bluetooth 5.4.6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026Codecs SBC, AAC, aptX, aptX Adaptive, aptX Lossless, LC3 and LDAC. The aptX family and LDAC are activated on Android.

LHDC, AAC, SBC1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026The source names LHDC 5.0, normalized to the schema codec name LHDC. AAC and SBC are also named. LHDC requires a compatible host.

Bluetooth profiles

A2DP, AVRCP, HFP, HSP1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: A2DP, AVRCP, HFP and HSP.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026English specifications: A2DP, AVRCP, HFP and HSP.

HFP, A2DP, AVRCP1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

LE Audio

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: LE Audio with the LC3 codec, available via firmware update only.6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026LE Audio is supported and can be chosen in the app instead of Google Fast Pair.

Not available

Auracast

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Auracast supported, available via firmware update only. The maker Auracast announcement lists the Air Pro 4.6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026Auracast is supported and needs a compatible smartphone. Owners on the maker community report that it needs a specific firmware.7Press releasemyearfun.com/press-release/auracast-is-here-unlock-a-new-era-of-shared-audio-with-earfunRead 15 October 2026Maker announcement of 6 November 2025 on Auracast. The product menu on the page lists the Air Pro 4 with Lossless Audio and Auracast. It gives no firmware version.

Not available

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

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: connects to two devices at the same time.

Yes1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

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

21Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: two devices.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review and spec table: multipoint with two devices.

21Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Multipoint with LDACiMany buds turn multipoint off on LDAC

Not available

Not available

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

Not available

Not available

Automatic switching between own devicesiThrough the maker's account

Not available

Not available

Fast pairing

Google Fast Pair1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Google Fast Pair on Android Marshmallow and above or 11.0 and later.

Google Fast Pair1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

15m1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: maximum working range 15 m without obstacles.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Troubleshooting: maximum range 49 ft (15 m) without obstacles.

10m1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Wireless receiveri2.4 GHz dongle

Not available

Not available

Receiver connector

Not available

Not available

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

Not available

Not available

Latency

2 of 3 differ

Low latency mode

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Ultra Low Latency Mode and Game Mode in the app.

Yes2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

Claimed latency

AEarFun Air Pro 4

Connection	Mode	Latency (ms)
Bluetooth	Game Mode	50

Source1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Feature list says < 50 ms and the text says 50 ms. Stored as 50 ms. The Bluetooth connection and Game Mode are the conditions. The host phone and codec are not stated.

BOnePlus Buds 4

Connection	Mode	Latency (ms)
Bluetooth	Low latency mode	47

Source2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Maker laboratory claim 47 ms in its low-latency feature. Host, codec and firmware are not specified. It is not an independently measured latency or a universal guarantee.

Lowest claimed latency

50ms=CalculatedFrom Claimed latency

47ms=CalculatedFrom Claimed latency

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.

Android, iOS1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: EarFun Audio app for iOS and Android.

Android, iOS3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026

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.

AEarFun Air Pro 4

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

Source1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Bluetooth is the only connection. Microphone support per platform is not stated.

BOnePlus Buds 4

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

Source3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026Original guide explicitly documents OnePlus Android and other Android/iOS pairing. No USB audio route is assigned to the charging case.

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

AEarFun Air Pro 4

Feature	Needs
LDAC	Android phone that supports LDAC. Turn it on in the EarFun Audio app under Bluetooth Audio Quality. The earbuds restart to apply it. iOS devices do not support LDAC.
Google Fast Pair	Android phones running Marshmallow and above or Android 11 and later per the maker page.
LE Audio and Auracast	The maker page says they are available via firmware update only. kopfhoerer.de says LE Audio is chosen in the app instead of Google Fast Pair and Auracast needs a compatible phone.
Game Mode	Turn it on in the EarFun Audio app. The latency claim is for Game Mode.
In-ear detection	Can be switched on or off in the EarFun Audio app. Auto-answer on insertion does not apply to VoIP calls.

Source1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 20262Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026LDAC section: Android only, switch it in Bluetooth Audio Quality in the app, and the earbuds reboot. In-ear detection excludes VoIP calls. Game Mode must be enabled in the app.6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026LE Audio is selected in the app instead of Google Fast Pair.

BOnePlus Buds 4

Feature	Needs
LHDC 5.0 high-resolution playback	Compatible Android device with LHDC 5.0. OnePlus Android 12 or later uses Earbuds Function. Other Android 7.0 or later devices use HeyMelody. Not supported on iOS.
OnePlus 3D Audio and Golden Sound	OnePlus Android 12 or later uses Earbuds Function. Other Android 7.0 or later and iOS devices use HeyMelody.
Steady Connect	Select OnePlus phones with OxygenOS 15.0.0 or later.
AI Translation	Select OnePlus devices with OxygenOS 15.0.1 or later. Supported languages are listed in the app.
Voice assistant shortcut	Enable in OnePlus phone Settings or HeyMelody. Available assistant functions depend on the smartphone and its installed assistant.
Single-tap playback control	Disabled by default. Enable manually in OnePlus phone Settings or HeyMelody.
47 ms low-latency mode	Automatically enabled for OnePlus phone users. Other brands require manual activation in HeyMelody.

Source2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Exact footnotes 1, 5, 6, 7, 8, 9 and 11 of the US maker product page. These limit advanced features, not ordinary Bluetooth audio compatibility.

Official licence

Not available

Not available

Battery and charging

10 of 13 differ

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

54mAh1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: 54 mAh x 2 for the earbuds. Typical or rated basis is not stated.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Specifications: 54 mAh x 2 and 600 mAh.

62mAh1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker unqualified cell capacity of one earbud. Typical versus rated is not identified.

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

No4Owner's manualoneplus.com/content/dam/oneplus/2024/eu/store/safety_guide/OnePlus_Buds_4_Safety_Guide.pdfRead 8 October 2026Original safety instructions explicitly prohibit replacing or disassembling the battery. No manufacturer-approved normal replacement procedure was found.

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.

AEarFun Air Pro 4

Mode	Codec	Includes case recharges	Hours (h)
ANC off	Not available	No	11
ANC off	Not available	Yes	52
ANC on	Not available	No	7.5
ANC on	Not available	Yes	35
ANC off	LDAC	No	8.5
ANC off	LDAC	Yes	40
ANC on	LDAC	No	6
ANC on	LDAC	Yes	28

Source1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: ANC off up to 11 h and 52 h in total with the case. ANC on up to 7.5 h and 35 h in total. FAQ adds LDAC rows: ANC off 8.5 h and 40 h, ANC on 6 h and 28 h. Figures vary with volume and content. A gallery footnote says the data is laboratory data with ANC off at 50 percent volume. The codec for the non-LDAC rows is not named.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Specifications: ANC off up to 11 h and 52 h in total, ANC on up to 7.5 h and 35 h in total, varying with volume and content.

BOnePlus Buds 4

Mode	Codec	Includes case recharges	Hours (h)
ANC off	AAC	No	11
ANC off	AAC	Yes	45
ANC on	AAC	No	6
ANC on	AAC	Yes	24
ANC off	LHDC	No	9
ANC off	LHDC	Yes	37
ANC on	LHDC	No	5.5
ANC on	LHDC	Yes	22
Call	Not available	No	6
Call	Not available	Yes	24
Call	Not available	No	4
Call	Not available	Yes	17

Source1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026All rows use 50% volume. AAC playback claims: ANC off 11 h buds / 45 h total and ANC on 6 h / 24 h. LHDC playback: off 9 h / 37 h and on 5.5 h / 22 h. Call rows 6 h / 24 h are ANC off, and 4 h / 17 h are ANC on. The maker labels those calls HFP, a profile rather than an actual speech codec, so codec is omitted for call rows. The call mode cannot encode ANC, so those conditions remain here. with_case includes the initial earbud charge.

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

11h=CalculatedFrom Claimed battery life

11h=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

6h=CalculatedFrom Claimed battery life

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

11h=CalculatedFrom Claimed battery life

11h=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.

52h=CalculatedFrom Claimed battery life

45h=CalculatedFrom Claimed battery life

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

35h=CalculatedFrom Claimed battery life

24h=CalculatedFrom Claimed battery life

Talk time (claimed)

Not available

6h=CalculatedFrom Claimed battery life

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

60min1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: charging time 1 hour for the earbuds.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Specifications: 1 hour for the earbuds.

50min1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker specifies earbuds-only charge time about 50 minutes. The separate about-80-minute result includes both earbuds and case, so it is not stored as case_charge_time_min.

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 case takes 3.5 hours to charge on a wireless charger. The case input is DC 5 V 1 A.1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: 3.5 hours for the case on a wireless charger and input DC 5 V 1 A.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Specifications: 3.5 hours for the case on a wireless charger.

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 pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Feature list: 10 minutes of charging gives 2 hours of playtime.

10min1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Earbud playback after quick chargeiEarbuds-only runtime after quick_charge_min of charging. A claimed case-inclusive total does not qualify. ANC, codec and volume conditions belong in the source note.

2h1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Feature list: 10 minutes of charging gives 2 hours of playtime. Earbuds only. ANC and codec are not stated.

3.5h1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker earbuds-only claim is 3.5 hours after ten minutes. Conditions ANC off, AAC, 50% volume. The eleven-hour quick-charge headline includes case recharges and is not stored here.

Charging case

6 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.

600mAh1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: 600 mAh for the charging case. Typical or rated basis is not stated.

530mAh1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker unqualified charging case cell capacity. It is separate from one-bud 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.

Not available

No4Owner's manualoneplus.com/content/dam/oneplus/2024/eu/store/safety_guide/OnePlus_Buds_4_Safety_Guide.pdfRead 8 October 2026Same original safety rule covers the device and accessories, including charging case batteries. Service repair and disposal are not routine user replacement.

Case charging port

USB-C1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table lists charging the case via USB-C.

USB-C1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Case full charge timeiBy cable, 0 to 100 %. A time the maker gives with the earbuds inside the case counts, and the source note says so.

120min1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Specs table: 2 hours for the case via USB-C.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Specifications: 2 hours for the case via USB-C and 3.5 hours via a wireless charger.

Not available

Wireless charging

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: wireless charging compatible.

No5Measurementsoundguys.com/oneplus-buds-4-review-142159Read 8 October 2026Reviewer explicitly states the USB-C case does not support wireless charging.

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

Qi5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: the case charges wirelessly on a Qi charging mat.

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

No1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026The manual shows white LED indicators on the case. No screen exists.

Not available

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

Not available

Not available

Controls

4 of 5 differ

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

Touch2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Touch controls section: taps on the earbuds.

Touch, Swipe2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

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

Touch2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Touch controls: one tap on the left earbud lowers volume and one tap on the right raises it.

Swipe2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

Gestures

Double tap: play or pause, Triple tap left: previous track, Triple tap right: next track, Single tap left: volume down, Single tap right: volume up, Hold 2 seconds left: noise cancelling, ambient sound or normal, Hold 2 seconds right: voice assistant, Call, double tap: answer or end, Call, triple tap: answer and switch between two calls, Call, hold 2 seconds: reject2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Touch controls table. SoundGuys notes the single-tap volume gestures can be turned off in the app.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review control table matches the manual. A single tap changes volume by default and can be turned off.

Single tap, Double tap, Triple tap, Touch and hold for one second, Slide up and down3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026Original English touch table. Single-tap playback is disabled by default and must be enabled in app settings.

Remappable controls

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026The manual lists customisable touch controls in the EarFun Audio app.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026App section: customizable touch controls.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: tap controls can be fully customised in the app.

Yes2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

Voice assistant

Voice assistant of the connected phone2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Touch controls: hold the right earbud for 2 seconds to activate the voice assistant. The assistant is the phone's.

Google Gemini, Google Assistant, Apple Siri2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

Sensors and health

1 of 9 differ

In-ear detection

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: in-ear detection pauses when you take the earbuds out and resumes when you put them back. It detects one or both earbuds.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026In-Ear Detection section: remove to pause and put back to resume or answer a call, not for VoIP calls. It can be switched off in the app.

Not available

Sensors

Not available

Not available

Heart rate sensor

Not available

Not available

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

Not available

Not available

Hearing aid featureiAmplification for mild to moderate hearing loss

Not available

Not available

Medical clearances

Not available

Not available

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

Yes5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: My Sound Profile in the app runs a hearing test that builds an EQ preset. This is a sound personalisation test, not a medical test.

Yes2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Not available

Not available

Fit and durability

3 of 7 differ

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

XS, S, M, L, XL2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026How to fit section shows ear tip sizes XS, S, M, L and XL.5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: five sizes of silicone ear tips are included.6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026Five sizes XS, S, M, L and XL.

S, M, L1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Ear tip materials

Silicone5Reviewsoundguys.com/earfun-air-pro-4-review-122469Read 15 October 2026Review: silicone ear tips.

Silicone4Owner's manualoneplus.com/content/dam/oneplus/2024/eu/store/safety_guide/OnePlus_Buds_4_Safety_Guide.pdfRead 8 October 2026

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

Not available

Not available

Ear tip fit test

Not available

Yes3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026

Dust and water rating, buds

IPX51Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: IPX5 sweat and water resistant.

IP551Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Dust and water rating, case

Not available

Not available

Water resistance depth

Not available

Not available

Software

2 of 6 differ

Companion app

EarFun Audio1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: EarFun Audio app.

HeyMelody and OnePlus Wireless Earphones3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026Original guide names built-in Wireless Earphones / OnePlus Buds settings on OnePlus phones and HeyMelody for other Android/iOS phones. Current US footnotes take precedence for advanced feature OS requirements.

App platforms

Android, iOS1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page links the EarFun App for iOS and for Android.

Android, iOS3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026

User firmware updates

Yes1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Manual and page: firmware update in the EarFun Audio app.2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026App section: firmware update.

Yes1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

Yes2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026

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.

5.2g(0.2 oz)3Press articlephileweb.com/sp/news/d-av/202407/18/60758.htmlRead 15 October 2026Japanese launch report from the maker's technical data: about 5.2 g per earbud and about 56 g for the case with the earbuds. SoundGuys gives 5 g and kopfhoerer.de gives 5.5 g. The 56 g on the maker page is the case with the earbuds, so no case weight is stored.

4.73g(0.2 oz)1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Maker single-earbud mass 4.73 ± 0.2 g. Empty-case mass is omitted because the linked workbook has 39.97 g and 39.57 g on differently keyed sheets without an exact colour/configuration bridge. Unlabelled dimension tuples do not establish axes.

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.

Not available

Not available

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

Not available

Not available

Certifications

1 of 3 differ

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

Hi-Res Audio Wireless1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Hi-Res Audio and Snapdragon Sound certifications with LDAC. A maker gallery image shows the Hi-Res Audio Wireless logo with LDAC and aptX Lossless.

Hi-Res Audio Wireless2Maker product pageoneplus.com/us/oneplus-buds-4Read 8 October 2026Maker displays Hi-Res Audio Wireless branding and describes compatible LHDC 5.0 high-resolution playback.

Communication certifications

Not available

Not available

FCC IDs

2AVIT-TW600L, 2AVIT-TW600R2Owner's manualdrive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/viewRead 15 October 2026Back cover label: FCC ID 2AVIT-TW600L for the left earbud and 2AVIT-TW600R for the right.

Not available

Other certifications

Snapdragon Sound1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Page: Snapdragon Sound certification.

Not available

In the box

2 of 2 differ

In the box

Earbuds, Charging case, Ear tips in five sizes, USB-C to USB-A charging cable, Cleaning stick6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026Technical data: ear tips, USB-C to USB-A cable, cleaning stick and charging case.

OnePlus Buds 4 (one pair), OnePlus Buds 4 Charging Case, Type-C Charging Cable, Ear Tips (S, M, L pairs, M pre-installed), User Manual and Safety and Warranty1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Cables included

AEarFun Air Pro 4

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

Source6Reviewkopfhoerer.de/test/earfun-air-pro-4Read 15 October 2026Technical data: one USB-C to USB-A cable. Length is not stated.

BOnePlus Buds 4

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

Source5Measurementsoundguys.com/oneplus-buds-4-review-142159Read 8 October 2026Reviewer explicitly identifies the supplied cable as USB-A to USB-C. Length is not stated.

Links

Not compared

Product page

www.myearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-black1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026

www.oneplus.com/us/oneplus-buds-41Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026

Spec sheet

www.myearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-black1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026

www.oneplus.com/content/dam/oneplus/2025/specs/buds4/parameter-na-buds4-0701.xlsx1Maker product pageoneplus.com/us/oneplus-buds-4/specsRead 8 October 2026Public maker workbook linked by the page. Rendered specifications select sheet P000001. The workbook also includes unselected P000002 with differing case mass and call-profile labels, so no exact colour-dependent case mass is inferred.

Manual

drive.google.com/file/d/1lB2QD83w071hBAMxW53WrJCoyxdrsUEx/view1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Public Google Drive link behind the Download button for the user manual. The same file is the manual used for this entry.

media.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20Manual3Owner's manualmedia.tatacroma.com/Croma%20Assets/Wearable/Wearable%20Devices/User%20Manual/316448_User%20ManualRead 8 October 2026Maker-authored original two-page English/Hindi user guide hosted by the retailer. Its English page was read in full. Global model identity is separately confirmed by the original OnePlus safety document E513A.

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

Not available

Not available

Warranty

1 of 1 differ

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

1.5years1Maker product pagemyearfun.com/headphones/earfun-air-pro-4-adaptive-anc-true-wireless-earbuds-blackRead 15 October 2026Global store banner and buy box: 18-month warranty. Global store market.

Not available

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