Many modern trucks are factory fitted with a multimedia system. The multi-functional display plays back navigation data, traffic information, radio stations and DVDs. If you want, it will also show the video signals coming from a rear view camera, which can be easily retrofitted. All you need is the matching truck adapter and this smart control box, the Dometic PerfectView SWITCH 200 VTO. It brings up to two cameras online and automatically detects when a trailer camera has been installed. Most multimedia systems already provide one free video input for a camera.