Supply voltage: 3.2V ~ 5.5V Default communication distance (opening test): about 600 m (adjustable communication distance to reach 1000 m, baud rate of 5000 bps) Default idle current : 16 mA (modules of different operating modes have a different operating current) Operating frequency range: (433.4-473.0 MHz, up to 100 communication channels) Maximum: 100 mW of power program.