Self-powered wireless switch: no cable, no battery, easy installation, environmental protection and no pollution. Safe and waterproof, can be directly installed in a bathroom, used with wet hands, can also control remote lamps and heaters, no fear of electric shock, no worry about rust or moisture on the battery, etc. Quickly change the position of the switch, create a switch anywhere, such as a remote control, remote control table lamp, etc., very convenient, compatible with any bulb, such as halogen / incandescent / CFL / fluorescent / LED. The maximum distance of the wireless remote control is 150 meters, but walls and obstacles will affect the distance. Before installation, we recommend testing the receiver distance first. What you find in the box: 2 x wireless switch, 1 x receiver.