1. Bluetooth chip 5.3, Sun light readable LCD screen

2. The main body is made of Resin, TPU strap

3. Button operation, Coin cell battery power

4. No charging

5. Equipment requirements: Android 4.4, IOS8.0 and above

6. Easy to use

7. Function: Heart rate monitor, Step tracking, calorie burn, mileage, alarm clock.

8. Water Resistant 50M