I have no experience with that actual camera but I once installed a 7” TV and mounted a miniature camera above the number plate, all hard wired, it was useful for reversing into a parking spaces however my mirrors did that job just as well.
What people really want to know is, what is the distance from the back of there car to the object behind them, while you can see the object behind you on the screen, you cant judge the distance through a TV screen as it is two dimensional, us humans having 2 eyes and have 3 dimensional vision and that is how we can judge distance the screen cant do that and that is why it doesn’t really work as well as we might think it will.
However if the camera were mounted, for example on the top of the rear of a double-decker bus looking towards the ground then it would work fine because it would show a distance of 8 to 10 feet behind the bus but this won’t work on a car because there is insufficient height and the camera can only be mounted looking straight back.
Dec