Specification: Type: Hand Sweep and Stepless Touch Dimmer Switch Voltage: USB 5V MAX Load: 3A Penetrating Wood Detection Range:<=25MM Features: 1 Smart touch dimmer management sensor change is utilized in the again of wood board (like kitchen cupboard ,wardrobe, closet..) or glass mirror. It can work on dc 5V led light, And it more flexible to stick anyplace you like,simple and simple to instation. DON&;T NEED OPEN HOLE!!! 2 contact sensor can sense the medium materials: wood plate, rock plate, stone, paper, acrylic, plastic, glass, and other non-metallic conductor supplies three distance: The diverse thickness touchy is different, the thinner the higher Please don&;t close to metallic supplies to circumvent interference