The monitor for the Furrion '12' model supports 2 cameras. You can for instance have a '12' mounted at the back of the trailer and have another 12 mounted at your hitch. In both cases it would be just for backup and hitch up, not for moving down the highway to see who's back there. The monitor will only show 1 camera at a time (no split screen) and you change from Camera1 to Camera2 at the monitor. Sounds good right? Not!
The Furrion '12' doesn't do close up very well (like if you wanted it at the hitch) because it's a very, wide angle lens. I guess you could mount 2 Furrion 12's, one on each side of your motorhome. I really didn't care for the resolution and performance of the 12s, the Furrion 48 is much better But...the Furrion 48 monitor only supports a single camera (not 2 as in the '12' setup).
If your RV came with a Furrion '12', change it. Call Furrion to request a swap-out. They were doing that for free, I don't know about recently.
2016 Wildcat 295RSX - 2015 GMC 2500HD DblCab Duramax/Allison 4x4 Z71 6.6' Bed
Maxxis 16" E; Ride Rite AirBags w/AirLift 1 wireless compr; Adv.Folding 4 Cover
Andersen Ultimate II Aluminum 5erhitch on Reese Flipball w/Curt 4" offset ball
LCI Ground Control 3.0 4pt + 2pt Elec.Rear stabilizers; 3 Slidecovers; 10ft. Portabote
6000# Dexters; mor/Ryde CRE3000 w/HD Wetbolts; King Dish Tailgater; 5hp Outboard
Dual A/C; Furrion 48 Rear Camera; Champion 3100 Inverter w/Extended Run