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. bath, used with wet hands, can also control lamps and heaters from a distance, without fear of electric shock, rust or damage. 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 n any light 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 that you test the distance of the receiver first. What you will find in the box: 2 x VIVIS wireless light switch, 1 x receiver