The RC switch can turn on and off other devices according to the signal from the RC receiver. You control the switch with any channel on the transmitter. When the PWM signal is higher than 1750uS, the switch closes. The switch supports voltages up to 40V and a current of 15A continuously (50A peak) so the switch is perfect also for switching devices with higher power, such as automatic smoke machines, lights, sound effects, flaps, landing gear and more.