1. Material: aluminum alloy, TPU, electronic component 2. Function: audio and video entertainment, heart rate monitoring, blood pressure measurement, sleep monitoring, blood oxygen detection, multiple exercise modes, Bluetooth calls, smart reminders, stopwatches, alarm clocks, steps, mobile phones to take pictures 3. Applicable language: Chinese, English, French, German, Spanish, Italian, Czech, Portuguese, Turkish, Greek, Latin, Danish, Polish, Dutch, Romanian, Arabia, Arabia Equivalence 4. Applicable system: Android 4.4 and above, iOS 9.0 and above 5. Bluetooth version: 5.1 6. Screen size: 1.32 inches 7. Screen resolution: 360 x 360 8. Screen type: IPS screen 9. fuselage memory: Flash 128MB 10. Battery capacity: 400mAh 11. Working hours: 5-10 days 12. Standby time: about 30 days 13. Operation method: touch+button type 14. Charging method: magnetic charging 15. Waterproof level: IP67 16. Size: dial: 4.6 x 1.3 cm, wristband long: 22 cm 17. Weight: about 180 grams