Electric Chain Hoist Duty Classification H4 Mount Type Motorized Trolley Maximum Lifting Capacity 500 lb Number of Speeds 2 Programmable Programmable by VFD Fixed Lift Speed Not Applicable Minimum Lift Speed 2.5 fpm Maximum Lift Speed 15 fpm Trolley Speed 40 fpm Maximum Lifting Length 20 ft Current at Minimum Voltage 3.4 A Current at Maximum Voltage 1.7 A Motor Horsepower 3/4 hp Operating Voltage 208-230/460V AC Headroom 14 13/16 in For Minimum Beam Height 5 3/32 in