Operating range: 10 meters (MAX), without signal disturbance and no direction limit.
Frequency range: 2.403GHZ ~ 2.480GHZ
Transmit power: +5db Max
Operation voltage: 3.3V
Operation current:< 50mA
Charging current:< 300mA
Sleep current:< 1mA
Battery Type: Built-in lithium battery
Shell color: Black
Item size: 147mm * 97mm * 19mm - 5.79in * 3.82in * 0.71in