Aux interface,Yomikoo Car Mp3 Player Audio Input Auxillary Aux Adapter 3.5mm Interface For VW Beetle 1999-2003,Jetta 1999-2002,Passat 1999-2001,Skoda SuperB 2003-2008,Octavia 2003-2007,Fabia 2003-2008 Not work with Navi, DVD or touch screen radio. Not work with audi MMI system. Not work with Polo 2004 with single-disc CD radios without MP3 function Compatible with: VW 8Pin Beetle 1999-2003, Cabrio 1998-2001, Golf/GTI/R32 1998-2002, Jetta 1999-2002, Passat 1999-2001, Polo 1999-2004, TS 1999-2002, Sharan 1998-2001; Skoda SuperB 2003-2008, Octavia 2003-2007, Fabia 2003-2008; Seat Ahambra 1996-2004, Arosa 1997-2004, Cordoba 2003-2006, Ibiza 1999-2007, Leon 2000-2005, Toledo 1999-2005, Vario 1999-2005 Plug & play installation,Jack-Connection,Smart design and Easy to install and use Audi 20pin connector(YT-Audi20)is optional for avoidingmodification on Audi 8pin radios Beetle 1999-2008 Cabrio 1998-2001 Golf/GTI/R32 1998-2002 Jetta 1999-2002 Passat 1999-2001 Polo 1999-2004 TS 1999-2002 Sharan 1998-2001 SuperB 2003-2008 Octavia 2003-2007 Fabia 2003-2008 Ahambra 1996-2004 Arosa 1997-2004 Cordoba 2003-2006 Ibiza 1999-2007 Leon 2000-2005 Toledo 1999-2005 Vario 1999-2005 Connect through the car CD player directly,Non-destructive installation. Support 3.5mm AUX audio input. High quality MP3/WMA decoder, let the music more pretty. with no Signal interference,no need to install baterry. If there is GDN wire, please check whether it connects well with metal part of the radio. Compatible with Audi and VW, Skoda, Seat 8 pin. Please confirm the radio interface before you order it. Not compatible with the Navi and DVD radio. The facotry connector must be removed to gain access to the CD changer port. The Audi 20-pin Adapter Cable should be used to accept the factory connector and plug into the radio.