niceEshop(TM) Wireless Digital Remote Control Light Switch Lightswitch(Black&White) Convinient, control light wirelessly One button can control a system of lighting or one button for one single light only Compatible with wall switch, you can use both of them as you wish Botton "A" to switch on, "B" to switch off, "C" to set time, "D" to open security function For ceiling lamp, quartz lamp, low voltage lamp, energy-saving light, exhaust fans, etc.