Electric Chain Hoist Duty Classification H4 Mount Type Motorized Trolley Maximum Lifting Capacity 500 lb Number of Speeds 2 Programmable Programmable by Internal Controls Fixed Lift Speed Not Applicable Minimum Lift Speed 5.5 fpm Maximum Lift Speed 33 fpm Trolley Speed 80/13 fpm Maximum Lifting Length 20 ft Current at Minimum Voltage 2.9 A Current at Maximum Voltage 2.8 A Motor Horsepower 5/8 hp Operating Voltage 380-460V AC Headroom 16 13/32 in For Minimum Beam Height 4 13/16 in