yes the gps ones shut the vid feed off to the main screen but it has the feature to hook up other screens (like behind the seat ones) the “shut off” does not turn off those screens off
so you take the RCA av out cable and plug it into the “rear cam input” the only downfall to duing this at the bottem of the screen is it watermarked “objects may be reversed” (you can watch the rear cam and drive at the same problem without bypassing anything)
understand?