In the 8th gen with navi I know you can install a rear view camera to be displayed on it. But I don't have a navi.

Has anyone installed a rear view mirror that has an LCD on it? That way you can hook up a rear camera to it. Are these mirrors even worth purchasing since they have a small screen? I haven't done much reading on them but is it possible to hook them up so that the screen comes on when you put the car into reverse?

Thanks guys