This Motion-Activated Light Control requires no wiring. It is ideal for chasing away prowlers and intruders as well as improving nighttime convenience and safety. When a dark room or an outside area the sensor is monitoring is approached, a light will go on automatically for a period of five minutes and then shut off. The wireless motion sensor is weather sealed for long life and activates the plug-in receive from up to 100' away, with the signal passing through doors, walls and floors. An override feature allows you to turn lights on and leave them on. Requires 4 AA alkaline batteries, (not included).