I installed an earlier model wireless system from RVS with only a back up camera, but I can add up to three other cameras if I wish. To improve the reception, I used an antenna and mounted it to the top of the trailer on the road side. I wired it into a running light, so I can have it on anytime I need it. As a wireless system, there can be interference, but it just about always works well when I need it to. If you don't mind the work or expense of installing a wired system, I think a wired system won't suffer from any interference. I'm certainly glad I have the system and customer service at RVS has been very helpful in replacing a broken monitor antenna, and sending me an antenna to use with the camera.
