This wall mount occupancy sensor uses passive infrared (PIR) technology to detect movement in the surrounding space and automatically turn the lights on and off based on motion in the room. It is ideal for 120V residential applications including entryways, hallways, closets, storage areas, attics, utility rooms garages or any other area that requires a light or fan to be active while occupied. The PIR sensor detects changes in the infrared energy given off by occupants as they move within the coverage area. When occupancy is detected, a self-contained relay switches the connected load on. An internal timer automatically turns off the load after a selectable period of inactivity ranging from 18 seconds to 10 minutes. This sensor also has adjustable sensitivity, time delay and light level settings so that you can customize it for your application. It can be mounted at heights up to 8.2 feet and has an adjustable coverage range from 6.5 to 26 ft. It has a 180-degree detection angle. Sensitivity, time delay and ambient light settings can be adjusted using the dials on the bottom of the unit. This sensor is ETL Listed and is backed by Maxxima for 1-year.