Dual axis motor drives, designed for EQ3-2 & EQ5 mounts, are essential in long-exposure astrophotography. They precisely control the telescope's tracking speed to compensate for the earth's rotation during long exposure of celestial objects. Available in 2x, 4x, and 8x speeds through the hand controller. These DC motor drives run on 4 "D" cell batteries (not included). Motors for both axes, clutches, cables, hand controller and battery case are included.