Light function: Button to control the light on/off. Light switch set, adjustable fan speed, timer, one-touch control. Compatible with most ceiling fans and lamps. Switch on the lights, adjust the fan speed, timer, one touch to stop. Comes with a remote control holder. Precise, backup function, ignores obstacles. Voltage and current: General edition 110V and 220V (universal). Remote control distance: Indoors through a wall 10m, open space distance 30m.