... Can used for 50KG/10M curtain. 4: Easy to installation, built-in the receiver and automatic limit sensor system.5: Quiet, stable, ... of track when installation. 8. When use this motor , curtain can be controlled manually also.9. Special function: if ... close), then the curtain will move automaticly along this direciton till it completely open or close. DC drapery curtain motor, motorized curtain system