. Bluetooth version: V3.0
2. Operating system: > 6 meters
3. Modulation system: GFSK
4. Operation voltage: 3.0-5.0V
5. Working current: < 3.0mA
6. Standby current: 2.0mA
7. Sleep current: < 150uA
8. Charging current: > 100mA
9. Operating temperatures: -10~45 degree Celsius
10. Product size: 25.5*9.2*1.5cm
11. Charging time: 2-3 hours
12. Compatible with iOS, Windows and Android version 3.0 above