xiaomi stereo bluetooth earphone with hook v4.1 support two connects

product features:   

1- Charging voltage: USB 5V
2-Working current: 10-20mA
3- Bluetooth Working range: 10M
4. 4.0(Headset/Hands-Free/A2DP Profiles)
5.Output power: 2x18mW
6.Frequency range: 2.401-2.480GHz
7. Distortion factor: ≤1%
8.Frequency response: 20Hz-20KHz
9.Working Time: Music state 5.5 H/ Talkingstate 5H
10.SNR: S/N≥95
11. Charging Time: 2h
12.-Bluetooth name: 
13.Speaker: 16Ω20mW
14.Battery: 3.7V/80MAH (Polymer rechargeable battery)
ing environment -10~60℃