Estone Table light Parts On/off 1 Way Touch Control Sensor Bulb Lamp Switch for 220v AC Touch 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 220V +/- 10% , 50HZ This is off/on only, can not adjust the brightness Suitable for ordinary light bulbs and energy-saving lamps