Note: The color of the item may vary slightly due to photography and your own computerTouch lamp desk light 1 Way Sensor Switch Repair Lamp parts: Off-on 4-wire touch switch that (once installed) works by touching any metal on your table lamp(including the harp or saddle). Voltage: AC 220VPress-on, press again-offDimension: approx. 4.5 x 3.5 x 1.5cmWeight: 18gThis is off/on only, can not adjust the brightnessSuitable for ordinary light bulbs and energy-saving lampsNotes:If the Sensor lamp Switch can not work well,pls try the following steps:1. Whether you have connected the wire correct2. The power of lamp/bulb can not exceed 60W.3. after installing the touch device,opening lamp can not be allowed on power cord.4. The yellow line must be connect with conductor, such as metal,can not connect with plastic or wood.5. The one way switch suitable for ordinary light bulbs and energy-saving lampsPackage include:1Pcs One Way Sensor Switch