1. Battery capacity: 420mAh
2. Waterproof rating: 5ATM swimming waterproof
3. Wireless connection: Bluetooth 5.0BLE
4. On a single charge it can be used for 14 days in classic mode
5. Built-in multi-function NFC easy to use
6. Function: blood oxygen detection sleep monitoring heart rate detection exercise mode etc.
7. Size: 46.2x53.3x11.4mm
8. Compatible with Android and iOS systems