Turn your manual German equatorial mount into a tracking mount by adding the included RA motor drive to your telescope. This easy-to-install RA motor drive compensates for the Earth’s rotation, so the telescope tracks a star’s movement through the night sky from east to west.  When the telescope mount is properly polar aligned and the RA drive is attached and running, the user need only make occasional adjustments in declination  to keep an object in the eyepiece for long periods of time.  The Celestron single-axis motor drive runs on a 9V battery, so there are no cords to get in the way.  The drive can be used in either the Northern or Southern Hemisphere.  To change hemispheres simply by flip the N/S switch on the face of the motor drive.  It is also simple to change the speed of the motor.  A “Speed Rate Regulator” knob is located just under the power indicator and can be turned in either direction to slow down or speed up the motor.