I had one on my truck & trialer that was destrye din an accident. Plannign to install anothe rin my class C. I will hard wire it by runnign cable along the underside. On my trialer I rn the wire in a small conduit up the laddr. This rig doe snot have oen so I will use a stick on conduit so it looks relativeley neat. I hung the 7 inch monitor on my rear view mirror which does noto do anythign in this rig except show the interior. Doing it all myself cost less than $100. I have the camera on all the time, not just backing up. You can pull 12v off riding lights, you just have to drive with the parking lights on.