To connect a Dometic PerfectView camera to your multimedia display all you need is a Dometic control box and the RVVO1 truck adapter. The Dometic PerfectView RVVO1 is a custom fit for older make Volvo multimedia systems. Dependend on the selected switch box it is compatible with all Dometic cameras. For installation of the CAM 55 NAV, you won't even need the control box. The adapter will do.