1. Bluetooth: Bluetooth 5.0 version 2. Battery type: polymer battery 3. Battery capacity: 240mAh 4. CPU: realtek RTL8762CK 5. Charging time: 1.5 hours 6. Battery life: standby for more than 10 days, use for 5-7 days 7. Sensor: three-axis sensor 8. Heart rate chip: HS3300 9. Waterproof level: IP67 life waterproof 10. System compatibility: support Android 4.4, IOS 8.4 and above systems 11. Screen size: 1.28 inches TFT LCD, resolution: 240*240 12. Appearance material: zinc alloy 13. The bracelet supports languages: Chinese (Simplified, Traditional), Japanese, English, French, German, Italian, Spanish, Russian, Portuguese, Polish, Malaysian 14. Functions: dynamic heart rate, smart camera, change standby interface, call reminder/rejection, multi-sports mode, information storage, stopwatch, information reminder, sleep monitoring, alarm clock, find bracelet, find mobile phone, exercise record (pedometer) , Calories burned, mileage), time, week, date display, sedentary reminder, 24h 12h time format selection, metric and imperial system selection, 15. Dimensions: 259mm, 52x57x15mm 16. Weight: 38.3g 17. Packing list: charging cable + manual + watch