Self-powered wireless switch: no cables, no batteries, easy installation, environmentally friendly and pollution-free. Safe and waterproof, can be installed directly in a bathroom. Can be used with wet hands to control lights and heaters from a distance without risk of electric shock, rust or damage. No battery corrosion issues. Easily reposition the switch to create a control point anywhere, such as a remote control for a table lamp and more. Compatible with any light bulb, including halogen, incandescent, CFL, fluorescent, and LED. Maximum wireless control distance is up to 150 meters, though walls and obstacles may affect performance. Before installation, test the receiver's range. Package includes: 2 x VIVIS wireless light switches, 1 x receiver