The DV115 is a light weight pan & tilt head especially optimized for the JVC GY-DV300REM camcorder. The digital design of the DV115 allows the adapability necessary for special requirements. DIP Switches located at the base of the unit make special functions and configuration changes easily implemented. The DV180 digital controller was specifically designed to get the most from a DV115. You may use up to four DV115s with each DV180 controller.