Danlers PIR Occupancy Switch with absence detection, Ideal for meeting rooms, bedrooms, hotel rooms, student and military accommodation, classrooms etc. These neat and unobtrusive models are ideal for flush mounting through suspended or plasterboard ceilings. They have a 2m cable, for quick installation. When someone enters a room the lights are turned on using a wall switch. When the occupant leaves the room or area of detection the CEFLA PIR automatically switches the lights off after a pre-selected time. The override OFF function allows the occupant to turn the lights off from the wall switch (while the CEFLA PIR is in the ON state) without waiting for the pre-selected time lag to time out. The lights can be switched back ON by operating the wall switch in the usual way.