The WattStopper WS Series occupancy sensor is a decorator style automatic wall switch with an attractive, low profile design. It replaces a standard wall switch to turn lighting on when a room is occupied and off when the room is vacant. The WS Series has advanced passive infrared (PIR) technology and a two-level lens to sense when a room is occupied. It also contains an adjustable light level sensor to keep lights off when ambient light is adequate. Kele is the leading supplier of building automation products. When you need the right product, right now, count on Kele.