Battery & PerformanceCapacity: 300 mAh Li-Ion batteryBattery Life: Up to 40 days on standby, 10 days of typical use, and 3–5 days under heavy usage (approx. 3 days with Always-On Display mode)Charging: Magnetic charging cableConnectivity & Smart FeaturesConnectivity: Bluetooth v5.4 with a range over 10 metersAudio: Built-in speaker and microphone for Bluetooth callingSmart Tools: Phone notifications, music control, remote camera shutter, calculator, stopwatch, alarms, and AI voice assistant supportCompatibility: Works with Android and iOS devicesHealth & FitnessTracking: 24/7 heart rate monitoring, blood oxygen (SpO2) measurement, sleep tracking, and stress monitoringSports: Over 100 built-in sports and workout modes