6974434225138 · Orange · UK
CMF Buds 2a (store SKU 6974434225138 in Orange on the UK and US Nothing stores) are true wireless earbuds with ANC up to 42 dB, a 12.4 mm bio-fibre driver, four microphones and Bluetooth 5.4 with dual connection.
Specifications checked 26 Sept 2026.
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Manufacturer specifications5481158909 · Storm Gray · UK
OnePlus Buds 4 are true wireless earbuds with real-time adaptive ANC, a dual-driver design (11 mm woofer plus 6 mm tweeter) and Bluetooth 5.4 with LHDC 5.0, AAC and SBC, plus Steady Connect for extended range on select OnePlus phones. This record is the Storm Gray colour (UK SKU 5481158909); OnePlus rates it at 6 hours with ANC on and 24 hours with the case using AAC.
Specifications checked 26 Sept 2026.
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Differences first. Select a topic for its graphic, sources and conditions.
Yes and No describe the listed feature. Missing evidence stays unverified.
Manufacturer-stated mass of one earbud, plotted only when both sources state a per-earbud figure. The charging case is separate. This is not a comfort or fit rating.
Manufacturer specification · Each earbud. The charging case weighs 42.75 g.
Manufacturer specification · 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).
Start with your listening environment. Open and closed earcups suit different surroundings. A closed back is not the same as active noise cancellation. Check the exact cable and headphone output. We do not turn impedance, driver size or unpaired lab results into a sound-quality score.
11 verified differences, most decision-relevant first. 1 is also drawn in Visual facts above. Missing information stays separate.
Manufacturer specification · The manufacturer lists AAC and SBC codec support; support for other codecs remains unverified. Charging is quoted with a Type-C cable.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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 (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewCheck the exact configuration and source conditions for your use.
Manufacturer specification · Nothing laboratory results at 25 °C, 50% volume, AAC, other features at default settings; actual life varies with use. Talk time is listed separately (earbuds 3.5 h ANC on / 4 h ANC off; with case 15.6 h / 18.4 h).
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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 (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsManufacturer claims for the stated mode and equipment. Read each test condition; this is not measured everyday battery life.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · Woofer: 30-layer ceramic-metal diaphragm; tweeter: flat diaphragm.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewCheck whether the diameter describes the complete transducer or only its diaphragm. Different labels and driver sizes do not establish better sound.
Manufacturer specification · Nothing says all these features are available on Nothing OS and in the Nothing X app for iOS and other Android devices (Android 6.0 and above, iOS 13 and above); on Nothing OS 1.5.6 and higher the settings are built into the phone.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewCheck the exact configuration and source conditions for your use.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsManufacturer claims for the stated mode and equipment. Read each test condition; this is not measured everyday battery life.
Manufacturer specification · Fast charge: after a 10-minute charge, up to 5.5 hours of playback with the case or 2 hours without it (ANC off, 50% volume, AAC, Nothing laboratory, 25 °C).
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsCheck the exact configuration and source conditions for your use.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewCheck the exact configuration and source conditions for your use.
Manufacturer specification · Customisable (footnote 7): double tap, triple tap, tap & hold and double tap & hold can be set to next song, previous song, volume up, volume down, voice assistant or switching noise cancellation modes, via phone settings on Nothing OS 1.5.6+ or the Nothing X app on Android 6.0+/iOS 13+.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewCheck the exact configuration and source conditions for your use.
The specification lists 'IPX2 case', but footnote 4 says the IP54 test applies to the earbuds and 'the charging case is not supported'; the case rating is therefore left out. · Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewCheck the exact configuration and source conditions for your use.
Manufacturer specification · Each earbud. The charging case weighs 42.75 g.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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 (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsA size or weight trade-off; it does not establish the better product.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsA size or weight trade-off; it does not establish the better product.
No source recorded for this side.
Manufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Three earbud taps activate AI Translation on the OnePlus phone; available on select OnePlus devices with OxygenOS 15.0.1 and above.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Music playback with the case, AAC, ANC on and 50% volume. OnePlus Test Laboratory claim; actual performance varies.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · The source describes charging, not USB audio or data operation. Compatible charger power and a cable-audio mode are not established.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · A pair of earbuds and a charging case (with a lanyard hole); ear tips in sizes S, M and L are in the box. Nothing does not state the ear tip material.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOne source states less detail or a rounded figure. This is not a verified difference; check the exact configuration.
Manufacturer specification · Fast Pair works on supported Android devices running Google Play services 11.7+ (back to Android 6.0); Find My and device renaming support need Android 10 or later.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Listed by name only; OnePlus does not describe how it works on these pages.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
No explicit head-tracking presence or absence is established in the complete reviewed Buds4 pages. OnePlus3DAudio alone does not prove head tracking. · Manufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The Other features table says 'less than 110 ms under Game Mode' with a Nothing Phone; footnote 5 says latency can be reduced to as low as 110 ms with Nothing phones and Game Mode on. Source field: Low lag mode.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · OnePlus Test Laboratory figure; enabled automatically on OnePlus phones, manual operation in the HeyMelody app on other brands.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Buds4 gives no dBV/Pa reference; Pro3 explicitly gives dBV/Pa. These different bases cannot establish a microphone-performance difference.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · UK: 49.02 ± 1 g; US: 49.42 ± 1 g. These are published total values, not newly calculated sums. The regional difference remains unexplained.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The Sound features table says 'Ultra Bass Technology'; the product copy calls it 'Ultra Bass Technology 2.0'.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · No frequency, input reference, weighting or explicit maximum label is supplied in this row. Do not reinterpret as maximum SPL or sensitivity.
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · 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.
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
The complete reviewed Buds4 pages describe three microphones per side but do not establish VPU presence or absence. · Manufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
The complete reviewed exact pages list USB-C charging but do not explicitly establish wireless-charging presence or absence. Omission does not mean false. · Manufacturer specification
OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overviewEvidence is missing or conflicting on at least one side. This is not a verified difference.
3 shared fields have the same recorded value.
Choose a starting point, then fine-tune your must-haves.
These shortcuts select the features shown above. Check the fit against your own equipment and listening space.
A feature match describes the selected requirements. It doesn’t rate sound or comfort.
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Select a feature to check your fit.
| Specification | Nothing CMF Buds 2a | OnePlus Buds 4 |
|---|---|---|
Wearing style SourcesNothing CMF Buds 2a Manufacturer specification · A pair of earbuds and a charging case (with a lanyard hole); ear tips in sizes S, M and L are in the box. Nothing does not state the ear tip material. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 Specs | In-ear, true wireless (ear tips in sizes S, M and L) | In-ear, true wireless (ear tips in S, M and L) |
Weight per earbudDifferent SourcesNothing CMF Buds 2a Manufacturer specification · Each earbud. The charging case weighs 42.75 g. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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 (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | 4.28 g | 4.73 g |
DimensionsDifferent SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Each earbud 32.5 x 20.3 x 24.3 mm; charging case 54.7 x 54.7 x 23 mm (height x width x depth) | Each earbud: 31 x 20.6 x 24.2 mm; charging case: 65.4 x 52.4 x 25.3 mm |
Dust, sweat and water resistanceDifferent SourcesNothing CMF Buds 2a The specification lists 'IPX2 case', but footnote 4 says the IP54 test applies to the earbuds and 'the charging case is not supported'; the case rating is therefore left out. · Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | IP54 (earbuds) | IP55 (earbuds only; the charging case is not rated) |
UK published case weight SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Not provided | 39.57 g |
UK published earbuds and case total weight SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · UK: 49.02 ± 1 g; US: 49.42 ± 1 g. These are published total values, not newly calculated sums. The regional difference remains unexplained. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Not provided | 49.02 g |
Wired / wireless connectionsDifferent SourcesNothing CMF Buds 2a Manufacturer specification · The manufacturer lists AAC and SBC codec support; support for other codecs remains unverified. Charging is quoted with a Type-C cable. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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 (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Bluetooth 5.4 (AAC, SBC) with dual connection; USB-C charging on the case | Bluetooth 5.4 with Steady Connect; LHDC 5.0, AAC and SBC codecs; dual-device connection |
Battery lifeDifferent SourcesNothing CMF Buds 2a Manufacturer specification · Nothing laboratory results at 25 °C, 50% volume, AAC, other features at default settings; actual life varies with use. Talk time is listed separately (earbuds 3.5 h ANC on / 4 h ANC off; with case 15.6 h / 18.4 h). Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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 (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Earbuds up to 5 hours with ANC on and 8 hours with ANC off; with the charging case 23 hours with ANC on and 35.5 hours with ANC off. | Earbuds: 6 hours with ANC on, 11 hours with ANC off (AAC). With the case: 24 hours with ANC on, 45 hours with ANC off (AAC). Using LHDC: 5.5 / 22 hours with ANC on and 9 / 37 hours with ANC off. |
Charge timeDifferent SourcesNothing CMF Buds 2a Manufacturer specification · Fast charge: after a 10-minute charge, up to 5.5 hours of playback with the case or 2 hours without it (ANC off, 50% volume, AAC, Nothing laboratory, 25 °C). Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Full charge (0-100%) in 89 minutes with the case connected to a USB-C cable; with the case unplugged, the earbuds charge inside it in 57 minutes | Earbuds about 50 minutes; earbuds + case about 80 minutes |
Bluetooth codecsDifferent SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | AAC, SBC | LHDC 5.0, AAC, SBC |
Multipoint (dual connection) Sources | Yes | Yes |
Low lag mode SourcesNothing CMF Buds 2a Manufacturer specification · The Other features table says 'less than 110 ms under Game Mode' with a Nothing Phone; footnote 5 says latency can be reduced to as low as 110 ms with Nothing phones and Game Mode on. Source field: Low lag mode. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 No source recorded. | 110 ms with a Nothing phone in Game Mode | Not provided |
Quick pairing SourcesNothing CMF Buds 2a Manufacturer specification · Fast Pair works on supported Android devices running Google Play services 11.7+ (back to Android 6.0); Find My and device renaming support need Android 10 or later. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 No source recorded. | Google Fast Pair and Microsoft Swift Pair | Not provided |
Battery capacityDifferent SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Earbuds 43 mAh each; case 460 mAh | Earbuds 62 mAh; charging case 530 mAh |
Low-latency mode SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · OnePlus Test Laboratory figure; enabled automatically on OnePlus phones, manual operation in the HeyMelody app on other brands. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Not provided | 47 ms low latency |
Case charging connector SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · The source describes charging, not USB audio or data operation. Compatible charger power and a cable-audio mode are not established. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | USB Type-C |
Playback with case, AAC, ANC on SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · Music playback with the case, AAC, ANC on and 50% volume. OnePlus Test Laboratory claim; actual performance varies. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | 24 h |
DriversDifferent SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · Woofer: 30-layer ceramic-metal diaphragm; tweeter: flat diaphragm. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Custom 12.4 mm dynamic driver, bio-fibre + custom TPU diaphragm, Dirac tuning | Dual drivers: 11 mm woofer + 6 mm tweeter |
Sound features SourcesNothing CMF Buds 2a Manufacturer specification · The Sound features table says 'Ultra Bass Technology'; the product copy calls it 'Ultra Bass Technology 2.0'. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 No source recorded. | Dirac, Ultra Bass Technology, Custom EQ; tuning by Nothing and Dirac | Not provided |
Frequency response SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (US) — OnePlus Buds 4 Specs | Not provided | 15 Hz to 40 kHz |
DAC SourcesNothing CMF Buds 2a No source recorded. | Not provided | Dual DACs: a dedicated DAC for each driver (11 mm woofer and 6 mm tweeter) |
Spatial audio SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Not provided | Spatial audio rendering |
Listed driver impedances SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | 18 Ω ± 15%; 10 Ω ± 15% |
Manufacturer sensitivity and reference SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | 118 ± 1.3 dB at 1 mW |
Unreferenced advertised sound pressure SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · No frequency, input reference, weighting or explicit maximum label is supplied in this row. Do not reinterpret as maximum SPL or sensitivity. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | 96.5 dB |
Manufacturer rated power SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | 10 mW |
Microphone SourcesNothing CMF Buds 2a Manufacturer specification · Four HD microphones in total (two per bud) with Clear Voice Technology and Wind Noise Reduction 2.0. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · Three microphones per earbud with 3-mic AI call noise cancellation. OnePlus (UK) — OnePlus Buds 4 Specs | Yes | Yes |
Active noise cancellation SourcesNothing CMF Buds 2a Manufacturer specification · ANC up to 42 dB (Nothing's laboratory theoretical maximum) over up to 2900 Hz, with Adaptive ANC and Transparency mode. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Yes | Yes |
Manufacturer microphone sensitivity SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · Buds4 gives no dBV/Pa reference; Pro3 explicitly gives dBV/Pa. These different bases cannot establish a microphone-performance difference. OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | -38 ± 1 dB |
Companion appDifferent SourcesNothing CMF Buds 2a Manufacturer specification · Nothing says all these features are available on Nothing OS and in the Nothing X app for iOS and other Android devices (Android 6.0 and above, iOS 13 and above); on Nothing OS 1.5.6 and higher the settings are built into the phone. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Nothing X app (Android and iOS): customise equaliser and controls, find my earbuds, low lag mode, software updates | Compatible with the HeyMelody app. Sound features: Sound Master EQ (Balanced, Serenade and Bass Mode presets, a customisable six-band EQ and BassWave); Golden Sound personal audio profile from an ear scan and listening test |
ControlsDifferent SourcesNothing CMF Buds 2a Manufacturer specification · Customisable (footnote 7): double tap, triple tap, tap & hold and double tap & hold can be set to next song, previous song, volume up, volume down, voice assistant or switching noise cancellation modes, via phone settings on Nothing OS 1.5.6+ or the Nothing X app on Android 6.0+/iOS 13+. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsOnePlus Buds 4 Manufacturer specification · 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. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Touch controls: double tap to skip forward or answer/hang up calls; triple tap to skip back or reject calls; tap and hold to switch between Active Noise Cancellation and Transparency Mode. | Touch controls on the stem: slide up or down for volume; long touch and hold to switch between Noise Cancellation and Transparency modes; single tap to play or pause; double tap for the next song; triple tap for the previous song |
Find My Earbuds SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · Listed by name only; OnePlus does not describe how it works on these pages. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Not provided | Yes |
AI Translation SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 Manufacturer specification · Three earbud taps activate AI Translation on the OnePlus phone; available on select OnePlus devices with OxygenOS 15.0.1 and above. OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Not provided | Yes |
Wireless case charging SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 The complete reviewed exact pages list USB-C charging but do not explicitly establish wireless-charging presence or absence. Omission does not mean false. · Manufacturer specification OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Not provided | Not listed by the manufacturer |
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Spatial audio head tracking SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 No explicit head-tracking presence or absence is established in the complete reviewed Buds4 pages. OnePlus3DAudio alone does not prove head tracking. · Manufacturer specification OnePlus (UK) — OnePlus Buds 4 SpecsOnePlus (UK) — OnePlus Buds 4 overview | Not provided | Not listed by the manufacturer |
Bone-conduction voice pickup sensor SourcesNothing CMF Buds 2a No source recorded. OnePlus Buds 4 The complete reviewed Buds4 pages describe three microphones per side but do not establish VPU presence or absence. · Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs | Not provided | Not listed by the manufacturer |
Closest headphones to this pair by shared key specifications. Not a popularity ranking.
Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.
