This DC motor Rotator kit is a user installed option. It operates using Moonlite's existing BR2 DC dual port controller. The DC motor kit is a belt driven design that can be added on easily to 2" format Moonlite focusers such as the CS and CF models. The rotator is a double bearing design for high load capacity and is belt driven. The DC version is for non-PC based use. Note for remote automation please pick the high resolution stepper motor version for full PC automation requirements. The DC motor version is ran with a battery powered hand controller with no USB port.