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 lights and heaters, no fear of electric shocks, no worries about rust or moisture on the battery, etc. Change switch position quickly, create a switch anywhere, such as remote control, remote control table lamp, etc., very convenient, compatible with any light bulb, such as halogen / incandescent / CFL / fluorescent / LED . The maximum distance of the wireless remote is 150 meters, but walls and obstacles will affect the distance. Before installation, we recommend testing the distance of the receiver first. What you find in the box: 2 x wireless switch, 1 x receiver.