Description:Touch lamp table light 1 Way 3Way Sensor Switch Repair Lamp parts: Off-on 4-wire touch change that (once installed) works through touching any metal on your desk lamp(including the harp or saddle) Voltage: AC 220V +/- 10% , 50HZ This is off/on only, can't alter the brightness Suitable for usual gentle bulbs and energy-saving lamps 100% brand new and superb Size (LxWxT): 4/1"x1"x0"(approx) Color: Black Wiring method: black and red twine are related to AC220V input, black wire is hooked up with white wire, and yellow twine is attached to the touch metallic physique [That is, the red is hooked up to the 220V dwell line input, the white is connected to the 220V live line output, the black is the common 0 line, and the yellow band is the contact line to the contact metallic physique 】