Audi Audio Interface,Moonet Car Mp3 Player Radio USB AUX Adapter for A2 A3 A4 S4 A6 S6 A8 S8 TT 1998-2006 Model Fit for Audi ISO 8Pin:2000-2005 A2,1998-2006 A4/S4,1998-2004 A6/S6,1998-2002 A8/S8,2000-2005 AllRoad,2000-2006 TT No signal interface,no battery required Direct Connection via CD changer Port with CD quality sound Please Note: not work with Navigation system and XM radio Support usb flash,cd car and 3.5mm jack input,can read Mp3/wma music format,and read usb stick,sd/sdhc/mmc card via our special sd card reader.