Specifications:

1. Charging voltage: MICRO USB 5V
2.Working current: 25-30mA
3.Bluetooth Working range: 10M
4.Output power: 2x20mW 
5.Frequency range: 2.401-2.480GHz
6.Distortion factor: ≤1%
7.Frequency response: 20Hz-20KHz
8.Working Time: Music state 7 H/ Talking state 10 H
9.SNR: S/N≥95
10.Charging Time: 2h
11.Bluetooth name: HV-800