We designed the link terminal on the sensor switch, the sensor can be plug and play after the wire is connected, and it is also convenient to replace. Please see the product picture for the wiring diagram.Widely Suitable for auto lighting corridors, stairs , bathrooms, basements, warehouses, garages,closet, advertisement light .In addition to control of LED lights, it can also be used to control exhaust fans, doorbells or other devices.Infrared sensor switch has feature of small size , lightweight,energy-saving and lowheat . Easy to install and operate in room or cabinet, plug and play. The sensor switch can be embedded or surface mounted .It is perfect for using snesors in home corridor stairs basement.Motion sensors will turns lights ON in the dark when human enter into the induction range and Off after 45S if the motion is undetected .It only work in night or dark .It is suggested that sensor installation height is about 3.5m;Best sensing distance is 2- 6M;Induction angle is front 110Motion Sensor Switch working voltage :100-240V ; Load Power :40W the load power must be under 40W Best sensing distance:2-6M ;Installation Height:3.5m; Recommended Installation Hole:20mm