Infrared sensor switch working voltage: 100-240V; Best sensing distance: 3-5M; Mounting hole diameter: 25mm/0.98 inch There are 4 wires, the outermost brown line is Live wire (L); the outermost blue line is Neutral wire (N); Yellow line and inside blue line connect to the bulb or energy-saving lamp. The PIR motion sensor switch features small size and lightweight, easy to install and use in rooms or cabinets, plug and play. Motion sensors turn on the lights in the dark when people enter the induction area and turn off after 45S if no motion is detected. It only works at night or in the dark. It is suggested that the sensor installation height is about 3.5m; Best sensing distance is 2-6M; Induction angle is 110° forward. Suitable for automatic lighting of corridors, stairs, bathrooms, basements, warehouses, garages, closets, advertising lights. Besides controlling LED lights, it can also be used to control fans, doorbells or other devices. Color: White Material: plastic Package Content: 2 * control 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.