I have an older pickup truck and a few years ago I attached a wired backup camera. Which required running wiring, opening up taillights. and splicing a connector. Very time consuming.
I just discovered the Auto-Vox magnetic wireless camera and started using this battery powered, non wired, reverse view camera which simply plugs into the cigarette lighter and is ready to go. No wiring needed at all. The best part though is the base for the camera can be attached magnetically, or secured permanently in place - your choice. The magnetic base is great for mounting it anywhere there is a metal surface. you could even use it as a forward facing camera if needed.
Simply start the vehicle, and the camera comes on. It will remain on for a set time of two minutes, four minutes, or if you want permanently. which is a great thing for towing a trailer. When vehicle is running you can activate the camera at any time by depressing a button on the side of the viewing screen, or on the cigarette lighter connector.
I am also impressed by the quality of the color of the image on the screen and the night vision is great. It comes with multiple mounting devices for dash, window, etc.
The magnetic base is a great idea. If I park for long periods of time when in vacation, etc. I can store the camera in the truck for safety.
This camera is a great improvement over the wired versions I have tried, and I think everyone wanting to see behind will appreciate the ease of installation, and flexibility of camera placement.