I put on one of those safty back up cameras from Walmart like 3 years ago. It's wireless, and comes on when the back up lights turn on. Works AWESOME. I have it pointed down right at my ball, and I can back right up under the hitch every time. The first few times I did it with the buddies they wondered how I got right under it. The camera just mounts right on your license plate screws, and the wire hooks into the back up lights. Then the monitor is just a 12V plug in the cab of the truck or van or whatever vehicle. WELL worth the $100 I spent.