This LOS2500 offers reliable motion detection with a 360 detection field with 2000 Sq. Ft. coverage. The infrared sensor notices small temperature changes caused by the motion of people within the protected zone and turns on lights automatically. The sensors attractive casing offers a curved edges help this sensor blend well into your ceiling. A green LED lights when motion is detected giving visual confirmation that the detector is working correctly and aids in initial setup. The included opaque stickers allow you to blind certain areas from the sensor reducing false detections. The adjustable sensitivity allows you to fine tune the amount of motion requires to trigger your lights.