Specifications: 1. Charging voltage: DC5V 150mAh 2. Working current: 25-35mA 3. Bluetooth A2DP Working range: 10m 4. Output power: 35mW 5. Frequency range: 2.401-2.480GHz 6. Distortion factor: ��1% 7. Frequency response: 20Hz-20KHz 8. Working Time: Music/ HuaTong state 4-6 hours (The Volume will affect the time) 9. SNR: S/N��95 10. Charging Time: 1h-2h 11. Talk time: 4-6 hours， play time: 4-6 hours 12. Music Playing Time: up to 4 hours 13. Frequency Response: 20 ~ 20000Hz 14. Sensitivity: 80dB 15. Impedance: 32 ohm 14. Bluetooth Bluetooth version 4.1 Package include: 1X mini Bluetooth headset 1X USB Cable 1X User Manual