Coidak CO817 Motion and Dark Sensor USB LED Night Light 0.1W Warm White Motion Sensor : turn ON automatically when sensing motion at night and auto-off after 30s for no motion detected , long detection distance up to 16.4ft . USB Powered : free of battery . Brightness : warm white light , no harsh and good for eyes at night . LED light : more energy-saving and long lifespan which up to 50000 hours . Fits for : bedroom , kids room , toilet , kitchen , porch , stair , closet , basement , garage and warehouse etc .