1. PIR motion & light sensor: at dark place, it will light up automatically when you get into 10ft detection range, and auto go out 15 seconds after you get out of the range 2. Suitable for stairway, drawer, under-cabinet, pantry, bedroom, wardrobe, workshop, bookshelf, attic, closet, basement, hallway, corridor, headboard, trunk lighting, etc. 3. Three modes: ON: constant lighting; OFF: turn light off; AUTO: auto-sensing state, light up automatically in the dark when motion is compact motion sensor LED under cabinet light adopt with high bright Epistar 5730 LED light source, combining passive infrared (PIR) technology to detect motions. Under AUTO mode, it will light up automatically in the dark when a motion is detected and auto turn off for hands-free convenience. 4. Easy installation: magnet and 3M adhesive tape, could be hung and stick-on no tools, screws or nuts are required when installation. 5. It is powered by 4 x AAA batteries(not included the battery) 6. Notices -As built-in photo sensor, it may not work in AUTO mode in daylight or bright surroundings. -Non-waterproof, do not use it in any heavy humidity or low temp location. -Try not to mount 2 lights so near. They may interact each other in AUTO mode.