I wanted something for my TV and got this setup.
https://www.amazon.com/gp/product/B009RIK3EO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1Great price, very easy to set up, ran wire along frame and into cab. I am planning on buying another camera (
https://www.amazon.com/Pyle-PLCM18BC-License-Distance-Waterproof/dp/B0079R2MH6) and some extension cords (RCA/phono and DC for power) and running it to the trailer. This screen has two inputs and allows you to switch between them very easily (even includes small remote). Here are a couple of pics of my setup. I've since moved the screen a little and mounted it better.
![](http://www.neiconi.com/ram/backup-01.jpg)
![](http://www.neiconi.com/ram/backup-02.jpg)
![](http://www.neiconi.com/ram/backup-03.jpg)
I'll post pics once I have the trailer camera done.