This flush mount ceiling light built-in PIR infrared motion detector, is powered by 4 D-cell alkaline batteries (not included). The motion sensor light is with high-quality SMD2835 LEDs inside, providing a longer lifespan and more uniform light. There are 2 modes, constant light or automatic mode, the light will be on as long as the motion is detected, no matter in the daytime or the dark. The package comes with instructions and accessories to meet your installation needs, without wiring.