Black · UK · Samsung part SM-R640NZKAEUB
Galaxy Buds4 Pro (SM-R640NZKAEUB in black for the UK, SM-R640NZKAXAR in the US) are Samsung's in-ear true wireless earbuds with silicone ear tips, a 2-way woofer-and-tweeter speaker, adaptive active noise cancellation and Bluetooth 6.1 with LE Audio. Samsung rates them at up to 6 hours of music with ANC on and 26 hours with the case.
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Specifications checked 26 Sept 2026Manufacturer specifications, not a hands-on test.
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Sennheiser HD 650508825 · titanium-silver · 300 ohm · standard 3 m unbalanced cableSamsung lists a 2-way woofer-and-tweeter speaker with dual amplifiers plus Voice Detect and Siren Detect; the Galaxy Buds4 has a 1-way driver with a single amplifier and Samsung says those two detection features are Buds4 Pro features.
IP57 rating on the earbuds (Samsung says the Charging Case is not water resistant), three sizes of ear tips in the box and a wirelessly charged case.
The Galaxy Wearable app is not supported on iOS, so iPhone owners get Bluetooth audio without Samsung's controls; elsewhere the app needs Android 12.0 or later, while Galaxy devices on One UI 8.0 or later use the phone's own settings.
Neither a USB-C cable nor a wireless charger is included, and each earbud weighs 5.1 g, heavier than the 4.6 g Galaxy Buds4.
Exact configuration: SM-R640NZKAEUB · Black · UK
21 specifications in 5 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.
Two separate earbuds with a charging case. Samsung lists earbuds, three sizes of ear tips (M fitted by default), the charging case and a Quick Start Guide in the box; no USB-C cable is included.
SourceEach earbud (30.9 x 18.1 x 19.6 mm). The charging case weighs 44.3 g (51 x 28.3 x 51 mm).
SourceIP57 is based on laboratory test conditions for submersion in up to 1 metre of fresh water for up to 30 minutes. Not advised for beach or pool use. If the earbuds are damaged they are not guaranteed to be water resistant; wet earbuds must be dried before being placed in the Charging Case.
SourceNo USB Type-C cable is included, and the wireless charger and cable are sold separately; Samsung does not name the case's wired charging port on this page. Charging power 2.5 to 4.5 W. On Galaxy devices with One UI 8.0 or later, settings are in the phone's device settings and Quick Panel; earlier versions use the Galaxy Wearable app, which needs Android 12.0 or above with at least 1.5 GB of memory. On iOS the earbuds connect as Bluetooth audio but cannot be controlled because the Galaxy Wearable app is not supported. Samsung (US) lists HD Voice, 24-bit/96 kHz audio, 360 Audio, Bixby and Gemini voice wake-up, Interpreter/Live Translate, Head Gestures and Gaming Mode as unavailable on non-Samsung Android phones with the app; iOS devices and PCs connected over Bluetooth get 16-bit/44 kHz audio, standard call quality, ANC and Ambient mode.
Samsung's rated figures; actual battery life may vary with usage conditions, settings, number of charges, Bluetooth signal strength and other factors. Earbud battery 61 mAh, case 530 mAh (typical). The Samsung US comparison table gives the same 6.0/26 h (ANC on) and 7.0/30 h (ANC off) play times.
SSC-UHQ (24-bit / 96 kHz) is off by default and available on listed Galaxy S, Z and Tab devices with One UI 6.1.1 or above. LC3 is used over LE Audio, which the paired device must support.
Moves audio between Samsung Galaxy devices: Galaxy Book with One UI 6.0 Book or later, Galaxy smartphones and Galaxy Tab with One UI 4.1.1 or later, and Galaxy Watch4 series or later, logged in to a Samsung Account. With Samsung TVs (launched Feb 2022 or later, after a July 2022 firmware update) it only covers phone calls.
SourceOnly available on Samsung Galaxy smartphones and Galaxy Tab devices with One UI 3.1 or later and selected Samsung TV models; support for 360 Audio and head tracking may vary by application and content.
SourceActive Noise Cancellation with Adaptive ANC, Adaptive Noise Control, Ambient Sound, Voice Detect and Siren Detect. Adaptive Noise Control, Voice Detect and Siren Detect are off by default.
SourceEach earbud contains three microphones (six in total), plus a VPU (voice pickup unit) sensor. Super Clear Call isolates the voice with DNN processing and sends it over Super Wideband up to 16 kHz; SWB is available on listed Galaxy devices with One UI 6.1.1 or above and may not be supported depending on the mobile network.
SourceOff by default; set in the phone settings of paired devices running One UI 8.5 and later.
SourceSamsung also lists Voice Command and Bixby Voice Wake-up (off by default).
SourceInterpreter needs a smartphone with Galaxy AI features on One UI 6.1.1 or later; availability varies by device model, and a Samsung Account login may be required.
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