Mr. Beams Wireless Motion Sensing LED Step and Stair Light. The Wireless Motion Sensing LED Step & Stair Light from Mr. Beams is a battery-powered, wireless, motion-sensor LED step light that requires no wiring. Simply insert 3 C batteries (not included) and attach to any surface. The unit is designed such that you can mount it in a convenient location and it won"t get in your way. A built-in photocell activates the motion sensor only after the sun has set or when the lights are out. These are fantastic and bright stair and wall LED lights for hallways, stairways, steps, bathrooms, bedrooms, closets, garages, attics and basements. The Wireless Motion Sensing LED Step & Stair Ligh is weatherproof for year-round illumination. Attach these lights anywhere in minutes without an electrician. Mounting options include a mounting bracket that attaches with screws. Attach a stair light anywhere: to your hallways, stairways, steps, bathrooms, bedrooms, closets, decks and more. The stair light instantly turns on when it detects motion, and can detect motion from as far as 12 feet away with 180 degrees of vision. The bright LED and housing design focus the light where you need it--perfect for wall-mounted lighting applications. In glow mode, the LED light will remain turned on at a very low light level. At the very low light level, the light serves as a marker light identifying where the edge of the stairs are, for example. When a person approaches, the motion sensor will turn the light on to a bright light output to provide more light. After the auto shut-off time in which motion has not been detected, the Wireless Motion Sensing LED Step & Stair Light will return to LED glow mode. Tight seals and weather-resistant materials allow a Mr. Beams motion sensor indoor/outdoor LED step light to work in all weather conditions. Requires 3 C Batteries - Not included. Materials: ABS Plastic Dimensions: 3.5"L x 3"W x 1.75"H Weight: 0.3125 lbs