I used this 7" color monitor to view the inside of the trailer while traveling.
It can be used with 2 cameras. I upgraded the camera to an 18 led CCD and it works 100 times better than the one it came with.
It does need power to both the monitor and the camera.
I have extra cables and a remote control.
I have about $85 invested.
Listening to any offer.
Lower 48 conus only