The Touch Screen Curtain Controller is to control the open or close of the electric curtain that it can support up to 2 curcuits of electric curtain. 2-Gang Curtain Controller has 3 control functions, which are Open, Stop and Close. 2-gang touch screen curtain controller can be controlled by your finger and IR remote control in distance 10-15 meters. The curtain controller has blue backlight to show the status of curtain switch. The wiring diagram is very easy that it is similar to traditional switch, except required neutral line only.