I have one on the back of my truck camper, the wireless one. My camper wasn't pre wired but the install was easy and the the monitor (have it on my dash) is clear and it has night vision too. Had mine 3 years and no issues at all. Was a Christmas present from my wife.
Made in China, but what isn't today.
My favorite saying is... Only thing we make here anymnore is babies and they get delivered with Chinese medical instruments.
I'm very happy with mine. Like I said, monitor is clear and it works well. In fact I can be 75 feet from the camper ant turn it on and it works at distance too.