OnePlus Buds 4

Two earbuds (one pair) with a charging case; the box lists ear tips in S, M and L pairs, with M pre-installed. OnePlus does not state the ear tip material.

Each earbud, stated as 4.73 ± 0.2 g on both UK and US pages. The UK page gives the charging case as 39.57 ± 1 g (total 49.02 ± 1 g); the US page gives 39.97 ± 1 g (total 49.42 ± 1 g).

OnePlus: the earbuds feature IP55 water and dust resistance, however the charging case does not. Water and dust resistance may diminish with device ageing; liquid and dust damage are not covered under the warranty.

UK: 39.57 ± 1 g; US: 39.97 ± 1 g. The selected SKU is UK; the source discrepancy is unexplained. Do not average the figures, assert physical equivalence across regions or interpret case weight as the earbuds-and-case total.

UK: 49.02 ± 1 g; US: 49.42 ± 1 g. These are published total values, not newly calculated sums. The regional difference remains unexplained.

Google Fast Pair is listed without an exact supported-phone range on these Buds 4 pages. Steady Connect is restricted to select OnePlus phones with OxygenOS 15.0.0 or later. The declared Bluetooth range is 10 m; actual conditions and interference vary. Case charging is separate and does not establish cable audio.

OnePlus test figures at 50% volume with the stated codec. Fast charge: 10 minutes gives 3.5 hours (earbuds) or 11 hours (earbuds + case) with ANC off, AAC.

OnePlus Test Laboratory figure; enabled automatically on OnePlus phones, manual operation in the HeyMelody app on other brands.

LHDC 5.0 Hi-Res Audio up to 1 Mbps, 24 bit, 192 kHz. Hi-Res Audio is supported on Android devices with LHDC 5.0 (OnePlus phones with Android 12 and above via 'Earbuds Function'; other Android 7.0 and above via the HeyMelody app) and is not supported on iOS devices.

The source describes charging, not USB audio or data operation. Compatible charger power and a cable-audio mode are not established.

The complete reviewed exact pages list USB-C charging but do not explicitly establish wireless-charging presence or absence. Omission does not mean false.

Music playback with the case, AAC, ANC on and 50% volume. OnePlus Test Laboratory claim; actual performance varies.

The table gives two values but does not explicitly assign them to a named driver or a headphone input/load condition. Do not invent a woofer/tweeter assignment or amplifier compatibility result.

Buds 4 names a 1 mW input but no frequency or test fixture. Buds Pro 3 names 1 kHz and the literal “Input: -10 dB IEC711” notation, without identifying that input in volts or milliwatts. These do not provide sensitivity on the same basis; do not convert or rank them.

Woofer: 30-layer ceramic-metal diaphragm; tweeter: flat diaphragm.

Marketed as OnePlus 3D Audio. Set through Earbuds Function on OnePlus phones running Android 12 or later, or through HeyMelody for other iOS/Android 7 or later users. These pages do not explicitly establish head tracking.

No explicit head-tracking presence or absence is established in the complete reviewed Buds4 pages. OnePlus3DAudio alone does not prove head tracking.

No frequency, input reference, weighting or explicit maximum label is supplied in this row. Do not reinterpret as maximum SPL or sensitivity.

The Audio table does not explicitly assign this rating to an individual driver or define a continuous/peak basis. No power-handling or sound-quality ranking is established.

Real-time adaptive ANC advertised up to 55 dB and up to 5,500 Hz; modes: ANC on, Adaptive, Transparency and ANC off. The overview advertises 800 adjustments per second and a 200% voice-cancellation improvement (3×) against OnePlus Buds 3, based on OnePlus Test Laboratory results. These claims do not compare against Buds Pro 3, and no matched attenuation test is supplied. TÜV High Performance Noise Cancellation is a manufacturer-listed claim, not independently re-certified here.

Three microphones per earbud with 3-mic AI call noise cancellation.

The complete reviewed Buds4 pages describe three microphones per side but do not establish VPU presence or absence.

Buds4 gives no dBV/Pa reference; Pro3 explicitly gives dBV/Pa. These different bases cannot establish a microphone-performance difference.

Golden Sound (and OnePlus 3D Audio) is set in 'Earbuds Function' on OnePlus phones with Android 12 and above; other users (iOS / Android 7.0 and above) need the HeyMelody app. The specification page also lists OTA updates.

Listed by name only; OnePlus does not describe how it works on these pages.

Three earbud taps activate AI Translation on the OnePlus phone; available on select OnePlus devices with OxygenOS 15.0.1 and above.

Single tap must be manually activated in the phone Settings (OnePlus phones) or the HeyMelody app (other Android and iOS). OnePlus also lists a tap for the phone's built-in voice assistant (activated manually in the same way), Double-Tap for Camera Control and three taps for AI Translation on select OnePlus devices.