1. Bluetooth version: 4.2
2. Size: 70*70*27mm, weight: 50g
3. Material: High Strength ABS
4. IPX4 waterproof function, regardless of cloudy and rainy days running fitness any exercise can control
5. Battery Voltage Real-time Monitoring, Low Voltage Early Warning, Ultra-Low Voltage Automatic Shutdown Protection
6. Ergonomic design test in the wearing experiment, wearing senseless, comfortable, firm
7. A single charge can be listened to for 4 hours, almost meeting your long-term use needs.
8. Fully compatible with 95% Bluetooth devices on the market and all kinds of mainstream APP