1.The Smart touch dimmer control sensor switch is used behind wood board (like kitchen cabinet ,wardrobe, closet..) or glass mirror. It can work on dc 12V led light, And it more flexible to stick anywhere you like,simple and easy to instation. DON'T NEED OPEN HOLE!!! 2.The touch sensor can sense the medium materials: wood plate, rock plate, stone, paper, acrylic, plastic, glass, and other non-metallic conductor materials 3.Touch distance: The different thickness sensitive is different, the thinner the better Please don't close to metal materials to avoid interference Color temperature: white (6000K-6500K) Switch type: hand scan touch dimmer switch Penetrating wood detection range:less than equal 25MM Input voltage: AC100V-240V Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC 220V Colour:White Material:Aluminum alloy Size:40CM/50CM/30CM Package Contents: 3 x Aluminum LED Bar Light 1 x Touch Sensor Dimmer Swtich 1 x Power Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.