Quick Specifications: HUAWEI Watch Buds Screen size: 1.43″ AMOLED display, 466 x 466 Resolution, 326 PPI Strap: 22m leather strap Sensor: 6-axis inertial sensor (acceleration sensor, gyro sensor), optical heart rate sensor 5.0, ambient light sensor, Hall sensor, capacitive sensor, bone conduction device (VACC) Health Monitoring: SpO2, Female menstrual cycle, Heart rate atrial fibrillation screening, ECG etc. Motor: Linear Charging type: Wireless charging Operating system: HarmonyOS 2 or later; Android 7.0 or later; iOS 9 or above IP54 Supports for Earbuds Connectivity: Bluetooth 5.2, NFC Dimensions: Watch size: 47 mm × 47.5 mm × 14.99 mm Headphone body size: 21.8 mm × 10.3 mm × 10.3 mm Weight: Watch 66.5g approx. (without strap); Weight of a single earphone: Approx. 4g Dial Size: 47mm; Case: Stainless steel Wrist size: 40-210mm Battery capacity: 410mAh battery for watch; 30mAh on each earbuds Battery life: Watch up to 3 days Headphones single full battery life: Turn off noise reduction: listen to music for 4.0 hours / talk for 2.5 hours; Turn on noise reduction: listen to music for 3.0 hours/call for 2.0 hours Watches: Wireless Charging Headphones: Charging in the box