Powered by 4 AAA batteries 4 (not included) Led operation, low power consumption at allows a life of relatively long batteries. The detection beam is used to locate the movement to a distance of about 3 meters. When the light lights up, it will turn off only after of15 seconds without moving or when you leave the detection area.
With a sticker on the back magnetic system, installation is so easy and fast, without tools and movable or removable at will. Really good product I am delighted