More from Amazon.com : http://www.amazon.com/gp/product/B0000XMWBW?tag=purrfectcatdi-20

Orion 7826 EQ-1M Electronic Telescope Drive

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