... and mutil curtain for option "FILO-SFULL" door motor series are using general AC motor with mature process,stable quality ,reasonable prices. ... be mactched with romote control.2. Limit switch adjusts the door position in both “up” and “down” precisely and safetly ... .3. Under blacout situation, a pull chain operates rolling door manually and easily.4. Stable opetation,low noise ,samll vibration ...