2 Pack Wireless Motion Sensor LED Lights Light Remains On as long as motion is detected in darkness. Saves energy. Battery operated - Light, only when needed Automatic On at night when someone approaches the light. Multi-use - Front/Back Door, Porch, Basement, Attic, Stairway, hallway, etc. Detects Motion up to 25 Ft/ 7.6m of distance in darkness.