Light function: button to control the light off/on. Light switch set, wind speed adjustable, timing, one key full Compatible with most ceiling fans and lamps. Set the lights of the switch, wind speed adjustment, timing, one key to complete. Comes with remote control holder. Accurate, reserve function, ignore obstacles. Voltage and current: 110V and 220V general edition (universal). Remote control distance: indoor through the wall 10m, open space distance 30m.