1Automatic Sensing: With PIR sensor function, the light will illuminate when you get within 3 meters of it, it will delay 20s to go out after you walk beyond its sensing range. And its lighting function automatically starts only in the dark environment 2Simple Installation: No wire needed. There is a magnetic iron to use to adsorb it on the iron-made surface such as fridge. Another a 3m dual-side adhesive is provided to stick it on the surface of no-metal places 3Lower power consumption. 6 leds supply sufficient light and high brightness, but its power only need 0.3W 4Battery operated. It's powered by 3 x AAA batteries(Not Included) 5ABS material housing with high grade appearance, light weight, ideal for your using in corridors, workshops, basements, indoor garages, stairwells, doorways, closets, and other dark places