Backup Camera Upgrade

I just replaced with a wireless system. It still requires power at both the camera and monitor. Camera was a bit$h to get into old camera cavity on rear of coach. I have had all kinds of issues, with "Not loaded" error codes (no picture for this trip), to a series of still shots being displayed. I am also having issues with seeing the monitor pic in bright sunlight. If yo have polarized sunglasses - you don't see the image.
Other then that - no problem.
I would get a 9in monitor and consider Black and white!