Infrared Sensor Switch working voltage :100-240V ;Best sensing distance:3-5M ; Mounting Hole Diameter:25mm/0.98inch There are 4 wires ,Red line is Live wire (L); the outermost blue line is Neutral wire (N);Yellow line and inside blue line connect to light bulb or energy-saving lamp . PIR motion sensor switch has feature of small size and lightweight, easy to install and operate in room or cabinet, plug and play. 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. Widely Suitable for auto lighting corridors, stairs , bathrooms, basements, warehouses, garages,closet, advertisement light and other places. Induction angle:110degree Waterproof rating:IP22 Working temp: -20 Celsius -+40 Celsius Application lamps:LED lighting ,ceiling lamps,panel lights,floodlights ,etc. Colour:As shown Material:plastic Package Contents: 3 x Mini Motion Sensor Light Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.