This document describes a 115V VFD heavy duty electric chain hoist that is designed for medium to heavy industrial use. It has a built-in variable frequency drive that provides dual speed capacity. The compact body and plug-and-lift installation make the hoist versatile for any workstation application. Key features include a 4:1 speed ratio, NEMA 4 rating, ASME H4 heavy duty classification, upper and lower limit switches, and lifetime lubricated gears and bearings. It is available in models ranging from 1/2 to 3 ton capacity.