1.AV input and output,RGBS input. 2.DIP setting for rear camera 3.Built-in sound transmission function 4.OEM cable harness It is suitable for AUDI A4/Q5/A5 models non MMI function.Can make the original playing DVD,TV, REAR CAMERA, NAVI map, etc video and aido unitsBuilt-in CANBUS to operate the after-market units by original MENU knob.Built-in sound transimmition.With OEM cable harness, just plug ...