Product Parameters: 1. Model: iKUNKONG E882. Dimensions: 46mm in diameter, 11.6mm in thickness3. Screen: round IPS HD TFT4. Screen size: 1.32inch5. Resolution: 360*3606. Chip: Realtek 8762DW7. PPG Chip: OSRAM (osram) 27038. Blood Oxygen Chip: OSRAM (osram) 2703+HX36909. Temperature Sensor: CT1711 array10. ECG Chip: Ti chip 12911. G-sensor: STK832112. Bluetooth: 5.013. Battery Capacity: 280mAh14. Charging Way: wireless charging15. Charging Time: about 3-4h16. Battery Life: 7-12 days17. Standby Time: 30-40 days18. Waterproof: IP6819. System requirements:Android 4.4 + / IOS 8.2 + APP:smarthealth Features: 1. Keep an eye on your health:Blood oxygen / body temperature / ECG / respiratory rate / blood pressure / heart rate monitor, AI medical diagnosis, remote relatives and friends care, sleep tracker.2. A helper for workout:Pedometer, calories burned, distance, sports modes.3. A helper for daily life:Incoming calls reminder, sync notifications, multiple watch faces, alarm, raise wrist to wake watch, camera remote, Bluetooth music, DND mode, custom faces, weather, etc.