Rii mini i8 Wireless Keyboard 2.4G with Touchpad for PC android TV Black

without signal disturbance and no direction limit.
Frequency range: 2.403GHZ ~ 2.480GHZ
Operational voltage: 3.3V
Charge Voltage: 4.4V ~ 5.25V
Modulation: GFSK
Channel: 78channels
TX Power: less than +5dBm
Transmission rate: 1M bit/sec
Frequency tolerance: +/-30ppm
Power consumption: 55mA(on), 1mA(sleep)
Color:Black
Battery Type: Built-in lithium-ion battery
Notice: After 3 minutes without any operating will into sleep mode, press any key about 1s to wake up.