I have a rear view safety RVS-83112. I like it. It's not affected by bluetooth interference. It's wireless and probably good for the 75 ft range the mfr says it has. Generally, I place the camera on a steel post at the back of the site or my driveway and watch the trailer come into the parking spot, rather than on the back of the TT where the camera is moving in an arc and you don't see the approach. I find this easier than yelling at my wife!
2016 Flagstaff 27VRL Emerald
2014 GMC 2500HD CC 4X4 6.0L