1. Product model: M2102W1 
2. Screen: 1.6 inches AMOLED resolution 320*360 
3. Watchband material: TPU 
4. Adjustable length of strap: 125-205mm 
5. Sensor Optical heart rate sensor (including blood oxygen), acceleration sensor, gyroscope, geomagnetic sensor, ambient light sensor 
6. Waterproof rating: 5ATM 
7. Wireless connection: Bluetooth5.0 (Bluetooth Low Energy) 
8. Battery: 225mAh lithium ion polymer battery 
9. Typical usage mode: 12 days battery life 
10. Satellite positioning: support BDS/GPS/GLONASS/GALILEO 
11. Working temperature: -10 to 45 degree Celsius 
12. System language: support simplified Chinese, English 
13. Support system: Android 5.0 or iOS 10.0 and above 
14. Functions: sleep monitoring, blood oxygen monitoring, heart rate monitoring, 117 sports modes, timer, alarm clock, weather, stopwatch, call reminder, message reminder, find mobile phone, flashlight, compass, Alipay scan code payment, etc. 
15. Product net weight: 31g 
16. Product size: 39.1*34.4*9.98 mm (without watchband)