From the Manufacturer Precision mini-motor attaches to your Orion EQ-1 equatorial mount to allow motorized tracking of celestial objects. Motor drive provides regulated sidereal-rate tracking in right ascension. Hand controller has 2x and 8x speeds and pause mode. Includes motor, controller and battery case. Runs on four D-cell batteries (not included). Fits Orion EQ-1 equatorial telescope mounts