Recessed PIR motion / occupancy sensor switch with complete 360 degree detection angle. Enables connected lights to switch on automatically when someone enters the room. The light then stays on until the person leaves the room (and switches itself off when the room is unoccupied.) Occupancy sensors reflect the latest development in interior lighting technology and provide close to zero energy wastage in terms of lights being on unnecessarily. PLEASE NOTE: Not Suitable for use with Extractor Fans.Dimensions: Height: 7.7cmWidth: 8.5cmDepth: 8.5cmDiameter: 8.5cm