The Pyle Rearview Backup Parking Assist Camera and Display Monitor System is a great way to add the ability to see behind your car with a rearview camera. And it’s easy to set up The mirror monitor replaces your existing rearview mirror. A 4.3 in. display built into the mirror can show up to two video sources. The included license plate mount camera provides the rear view. Simple RCA connectors tie the two components together. Distance scale lines are projected on the mirror monitor’s image to help you gauge depth.