**Bluetooth Version:CSR4.0
**Dimension:83.59*63.64*28.37mm
**Built-in battery Voltage:3.7V
**Battery Capacity:400MAH
**Distortion :≤0.5%
**Loud Speaker dimension:32mm2W
**Net Weight: about 85g(include the watchband)
SNR:≥92Db
Charging Voltage:5V
Charging Time: about0.8-1hours
RMS:1.8 W;
The Maximum power :2W.
Working Time: about 2-4hours