This is a versatile telescope controler electronics. This equipment is the optimal choice for all medium to large telescope mounts. It controls the The built-in stepper motors of the mount, allowing the object positioning and tracking. To use this device, you should connect it to a computer, which is running planetarium software (eg, Ursa Minor Pro) or use a hand-held remote control. The device can be easily adapted to most astronomical telescope mounts. With the included (free download) software you can adjust the gear ratio, the current level of the motors and many other parameters. Thanks to the versatile configuration options the motors are running very fine. This capability makes it especially useful for useing at very good atmospheric conditions where the image in the telescope is very sensitive to any kind of small errors.