Automatic Chain Drive Garage Door Opener for Roll Up Door with Remote Control

A roller shutter / roller door is a type of door consisting of many horizontal slats hinged to-gether. The door is raised to open it and lowered to close it. With a Tubular motor / Central motor / Side motor fitted Automatic operation can be done.Side Motors are used for heavy weighted shutter & Central motor / Tubular motor for Me-dium & Light weighted shutter.It can be operated by electricity and manual. Precise limit by the limiter controlled automatically. Operate by manual when power off .