Wireless Trailer camera was crap. Came with trailer, standard industry junk. Replaced it with a high end wired Sony IPS6 backup camera (1/5th the size and 4 times the resolution - exceptional day/night). Connect truck to 5th wheel, plug in camera while plugging in power/lights, go. Perfect image entire trip, any weather.
Replaced the crap cameras truck came with as well, all of them.