Megadream 4 LED Motion Auto PIR Door Keyhole Sensor Detector Light - Automatic On/Off for Door, Kitchen, Stairway, Safe Cabinet, Living Room, Bedroom, Drawer, Closet, Workshop, Staircase, Basement Pyroelectric infared radial sensor infulence control: light sensor (only use at night, daytime won't work) Automatically identifies human body: light turns on when it detects people, and turns off automatically after 5-7 seconds Built-in light sensor, 4 bright cool-white LED lights, long life LED in 100,000 hours Sensor sensitivity angle: 60 angle Powered by 1 * AA battery (not included)