Package include a RC switch and a JST to futaba/JR adapter. This RC switch can be connected to receiver AUX channel or other desire channel. Toggle the related switch on the transmitter, this RC switch will close or open.Easily turn on or off lights, smoke system, bomb drops, plane canopies from your remote controller or transmitterSuper simple install, just plugs with the item you would like to control, no setup required. Just make sure in your radio the throw for the channel you would like to control is set to +/- 100%Suitable for RC cars, trucks, planes, helicopter, quadcopter and dronesInput Voltage (DC):3.7-15V. load current (DC):4A (Continuous current) Package included: RC Switch x 1 JST to futaba/JR cable x 1 Features: This RC switch is ideal for switching lights, smoke system, bomb drops, plane canopies, sound and any other auxiliary electrical items. It can be connected to receiver AUX channel or other desire channel. Toggle the related switch on the transmitter, this RC switch will close or open. when PWM duty is more than 1600us, the switch will turn on; when PWM duty is less than 1400us, the switch will turn off. Specifications: RX lead length:100mm Power out lead length:100mm Switching load current (DC):4A (Continuous current) Input Voltage (DC):3.9-15V LED the LED will on when RC switch closed; the LED will off when RC switch open