... DC motor, with power adaptor and plug, 1: Built-in the receiver, the curtain can be controlled by remote controller or manual.2 ... for 50KG/10M curtain. 4: Easy to installation, built-in the receiver and automatic limit sensor system.5: Quiet, stable, sealed ... .9. Special function: if you pull the curtain fabric a little to a certain direction( open or close), then the curtain will move automaticly along ...