I am in the middle of wanting to upgrade my GPS unit. I have a backup camera/7" lcd screen and wanted one that would display through the screen. Apparently that is asking too much. What Garmin has recommended is the use of a Dexl 760LMT which allows the backup camera to be connected to its 7" display. As I don't have a ton of room in the cab I need to keep things just large enough to see but not so large as to take up valuable space. Tried a notepad but was too large to keep mounted in the cab.