Uses motion sensors, and auto metering technology to automatically recognize the human body. Turns on automatically and turns off after about 5 seconds. Energy saving design.Bright LED bulbs 4 LED beads provide soft light to ensure you can see the keyhole at night without having to fumble at the door in the dark.keyhole light work perfectly in a dark environment, please test at night or in a dark room. Avoid using it in bright light, which will make the motion sensor less sensitiveBattery Powered. They are powered by 1 AA battery (not included), please make sure that the battery is in the correct positionFor Anywhwre Use, the compact fixture makes it effortless to blend into your modern home decor, stairwells, hallways, closets, closets and many other places providing the ideal soft light, it can also be mounted on a door above the keyhole.