iiMash AC220V 1 Way On/off Desk light Parts Touch Control Sensor lamp Switch for Bulbs (Black) 100% Brand new and high quality 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 220V Dimension: approx. 4.5 x 3.5 x 1.5cm This is off/on only, can not adjust the brightness