RV backup camera stuff

I've tried wireless backup cameras for the back of my pickup. You know the type that mounts on the license plate. I've never found one that works. They don't have broadcast enough power to get a signal to the cab of the truck. I don't see how this one would be any better.

The last license plate mounted camera I bought was a wired one. That one worked good,,,, until winter came. Then it conked out. They simply don't build a good back up camera for trucks. I gave up.