1. Matching system: Android 6.0 and above, iOS 9.0 and above 2. Screen: 1.43 inch AMOLED screen, 466x466 resolution, PPI 326 3. Battery capacity: 451mAh, magnetic charging base 4. Material: 316L low carbon stainless steel body + fluorine rubber/leather watchband 5. Safety protection: 5ATM waterproof 6. Theoretical working time: 14 days 7. Theoretical charging time: 1 hour 8. Bluetooth: 2.4GHz, BT5.0, support BLE/BR/EDR, 10-50m transmission distance 9. Operating System: LiteOS, ROM 4GB + RAM 32MB 10. Sensors: acceleration sensor, gyroscope sensor, geomagnetic sensor, optical heart rate sensor, ambient light sensor, air pressure sensor, capacitive sensor 11. Support blood oxygen / heart rate / sleep monitoring, 100+ sports modes, alarm clock, flashlight, timer, mobile phone search, remote control camera, Alipay, etc. 12. Support GPS, Beidou, GLONASS, GALILEO and QZSS five satellite positioning 13. Dimensions: 45.9x45.9x10.5mm 14. Weight: about 40g (without watchband) 15. Packing list: - Watch x 1 - Charging base x 1 - Charging cable x 1 - User manual x 1