Using detection of advanced infra-red sensor technology, different from the voice-activated and touch senor, it has advantage of highly sensitive, anti-interference, silence, reaction speed, long distance. Comes on automatically as you approach. Built-in light sensor can identify day and night by itself. Sleek design, smart appearance, ultra-thin fashion. Anti-theft features, it is easy to change battery. http://www.chinabuye.com/8-led-light-lamp-with-pir-auto-sensor