The T-2XDX Tailtwister Series II is designed for medium communications antenna arrays of up to 20 square feet wind load area. Low temperature grease, alloy ring gear indicator potentiometer, ferrite beads on potentiometer wires, new weatherproof AMP connectors plus 8-pin plug at control box, triple bearing race with 138 ball bearings for large load bearing strength, electric locking steel wedge brake, north or south center of rotation scale on meter, low voltage control, max mast of 2 1/16. It comes with a DCU-1X Digital Control Unit. Both operate at 220V.