Electric Chain Hoist, Duty Classification H4, Mount Type Motorized Trolley, Maximum Lifting Capacity 20,000 lb, Number of Speeds 1, Programmable Non-Programmable, Fixed Lift Speed 11 fpm, Minimum Lift Speed Not Applicable, Maximum Lift Speed Not Applicable, Trolley Speed 40 fpm, Maximum Lifting Length 20 ft, Current at Minimum Voltage 5.1 A, Current at Maximum Voltage 1.7 A, Motor Horsepower 4 3/4 hp, Operating Voltage 208-230/460V AC, Headroom 46 1/2 in, For Minimum Beam Height 6 29/32 in