Commercial Door Operator Hoist/Left Hand Mount Max Door Height (Ft.) 14 Max Door Width (Ft.) 22 Motor Type Medium Duty Motor HP 1/2 hp Voltage 115 V 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 - - Standards - Includes Wall Mounted 3-button Control Station Commercial Photo Eyes