LEDENET&reg; 12V 24V PIR Sensor LED Dimmer Switch Motion Timer Function Sign Control PIR8 Cotroller LED Strip Tape Lights Infrared detection controller, adopt infrared detection way to control load switch LED Lighting motion sensing switch which provides 1 to 10 minute OFF delay timing function The sensor switch activates ON when a body in motion enters the field of view with an ON time hold that is adjustable from 1 to 10 minutes after motion has ceased PIR (Passive InfraRed, IR) sensor has an effective range of 16 feet and diminished sensing of a moving human body to 26 feet The field of view of the PIR Dome Lens is 60 degrees nominal