Function :Auto switch on/off in the dark when you enter into the induction range, and the time delay has 3 way of 15 seconds, 45 seconds, 5 minutes adjustable.In addition to the automatic control of LED lights, it can also be used to control exhaust fans, doorbells or other devices. PIR motion sensor switch has feature of small size and , easy to install and operate in room or cabinet, plug and play. There are 4 wires , is Live wire (L); the outermost blue line is Neutral wire (N);Yellow line and inside blue line connect to light bulb or -saving lamp . Infrared Sensor Switch working voltage :100-240V ;Best sensing distance:3-5M ; Mounting Hole Diameter:25mm/0.98inch Widely Suitable for auto lighting corridors, stairs , bathrooms, basements, warehouses, garages,closet, advertisement light and other places., Weight: 0.0551155655 Pounds, Manufacturer: muqeu