OnePlus Watch4 46mm Black

OnePlus Watch 4

Its dual-processor design balances performance with energy efficiency. The setup pairs the Qualcomm Snapdragon W5 Gen 1 platform, which handles demanding tasks, with a BES2700 coprocessor tuned for background operations. Thanks to this, the watch can switch between the Wear OS 5.0 system and a low-power RTOS mode. Pairing requires an Android 9.0 or later handset with Google Mobile Services (GMS); iOS and Android Go editions are not compatible.

1.5-inch LTPO AMOLED screen

The 1.5-inch LTPO AMOLED panel features adaptive refresh technology, cutting energy use when in Always-On Display mode. It delivers 466 x 466 pixels (326 dpi) and reaches a peak brightness of 3000 nits, so it stays legible under direct sun. A 2.5D sapphire crystal guards the surface against scratches and impacts.

Durable build

The 47-millimetre casing is crafted from surgical-grade stainless steel with a matt black PVD coating. It is paired with a fluoroelastomer band featuring a steel buckle and a 22 mm fitting system. For toughness, it carries IP69 certification (resistant to high-pressure water jets and temperature), 5ATM water resistance and the MIL-STD-810H military standard.

Battery life of up to 100 hours

The 646 mAh cell provides as much as 100 hours of use in smart mode under Wear OS. With intensive usage (biometric sensors plus active GPS), runtime falls between 48 and 60 hours, whereas saver mode (RTOS) stretches it to 15 days. VOOC 10W fast charging refills the battery to 100% in 55 minutes.

Optical heart rate sensor

The sensing suite comprises an 8-channel optical heart rate monitor (HRV), blood oxygen measurement (SpO2), a skin temperature sensor and electrocardiogram (ECG) hardware. Together they allow advanced fatigue and recovery tracking.

GPS

For location tracking, it packs a dual-frequency Multi-GNSS L1+L5 system (Beidou, Galileo, GLONASS and QZSS), boosting accuracy in built-up urban areas. Connectivity also includes Bluetooth 5.3, dual-band Wi-Fi and an NFC chip for payments through Google Wallet. This model lacks eSIM support; data is transferred via the paired smartphone.

Technical specifications Design Dimensions 47.0 x 46.6 x 12.1 mm Case size 47 mm Weight 49 g (case) - 80 g (with strap) Material Surgical grade stainless steel Strap Fluoroelastomer (22 mm, interchangeable) Colour Black (matt PVD finish) Protection IP69 - 5ATM - MIL-STD-810H Display Size 1.5" Type LTPO AMOLED Resolution 466 x 466 pixels Density 326 dpi Maximum brightness 3000 nits (peak) Protection 2.5D sapphire glass Power and Hardware Processor Qualcomm Snapdragon W5 Gen 1 Co-processor BES2700 RAM 2GB Storage 32 GB eMMC Sensors and Health Health Sensors Heart rate (8 channels) - SpO2 - Temperature - ECG Motion Sensors Accelerometer - Gyroscope - Magnetometer - Barometer - Barometer Connectivity Bluetooth Bluetooth 5.3 Wi-Fi 2.4 GHz / 5 GHz GPS Dual frequency L1 + L5 (GPS - GLONASS - Galileo - Beidou - QZSS) NFC Yes (Google Wallet) Battery Capacity 646 mAh Battery life Up to 100 h (smart mode) - 48 - 60 h (heavy use) - Up to 15 days (economy mode) Fast charging 10W VOOC (100% in 55 min) Software System Wear OS 5.0 Compatibility Android 9.0+ - Google Services (GMS) Box Contents 1 x OnePlus Watch 4 Black (47 mm)
1 x Black fluoroelastomer strap (22 mm)
1 x Magnetic charging dock with USB-C cable
1 x User manual