Industrial Door Operator Hoist/Left Hand Mount Max Door Height (Ft.) 24 Max Door Width (Ft.) 22 Motor Type Continuous Duty Motor HP 1/2 Voltage 115 A Safe And Easy Way To Operate Small Rolling Doors And Grilles Or Industrial Sectional Doors With High Or Vertical Lift. Reversal System Adjustable Friction Clutch Radio Receiver - Ability to Control and Monitor with Smartphone Standards - Includes Wall Mounted 3-button Control Station