This handy, cordless light turns on automatically when it senses motion- up to 20 feet away. Then, when the motion stops, it turns off automatically 15 seconds later. Place it by an entrance, and it gives you light to unlock the door. Put one in the basement or garage so you don't trip while entering. Or put one in the hallway to light your way during the night. Made of durable plastic for indoor/outdoor use. The swivel mount lets you direct the light where you need it. Uses 4 AA batteries (not included). Bulb included. 4 3/4" x 3 3/4".