I bought a digital rear view mirror that takes two inputs. You can have two cameras, one for reversing, one as a rearview. The screen is actually two layers, an LCD screen, and a mirror, so you still have mirror functionality. You can adjust the image anywhere you like, full screen, 1/4 left, 1/4 right, and so on. I ran it through a toggle that also powers my CB, inverter...camera is always on when I drive. Been about 9 months, no problems yet.