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 of rust or damage. moisture on the pile, etc. Quickly change the position of the switch, create a switch anywhere, as a remote control, remote control table lamp, etc., very practical, compatible with any 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 VIVIS wireless switch, 1 x receiver