Jet VOLT-100-13P-20 Systems Volt 1 Ton Electric Hoist 1PH/3PH 230V 20' Lift (180120) Full-Range Speed Control - patented technology allows for smooth, seamless, continuous speed changes allowing for complete control throughout the lift True variable-speed control allows you to lift and lower faster when you need the speed, but be able to slow down the speed when you need the control With Full-Range Speed Control, the VOLT's minimum speed allows the user to slowly inch the load down for a soft stop Soft starts and stops also increase the life of gear train components, load chain, hooks and brake components H4 Duty Rating means the VOLT is engineered for demanding, industrial environments and the toughest applications