The RC switch is able to turn other devices on and off according to the signal from the RC receiver. You can control the switch with any channel on the radio. When the PWM signal is higher than 1500uS, the switch is on. The switch opens when the signal value drops below 1500uS. Switching is indicated by an LED. The switch supports a voltage of 3-5V and a current of 2A. There is no battery connector on the switch. The switched voltage is supplied by the servo connector from the receiver.