... -T receiver are option 1.Special car dvd player for Audi A4 2.2 din iso in-dush dmounting.3.Beautiful picture osd menu function ... .Built-in functions: dvd, dvd-r, dvd-rw, mpeg4,mp3,vcd,cd, cd-r,cd-rw, fm,am,4x40w amplifier,6.Front usb ,ipod ... 11.Video output/input : two video output,two video input (one video input for rear view system )12.4-ch rca ...