Battery-operated led motion sensor lights that turn on and off automatically. Bright led never needs replacing. Weatherproof design holds up through rain and snow. Motion sensor detects at 15' to activate light. Automatic shut off turns light off after 30 seconds. Operates for one year on 4 AA batteries not included. Attach a nightlight anywhere, to your hallways, stairways, steps, bathrooms, bedrooms, closets and more. Mr. Beams offers simple installation with no wiring and no electrician needed.