Aux Adapter,Yomikoo Car Audio USB/AUX Adapter MP3 CD Changer 3.5mm Interface and Aux for VW Beetle 1999-2008,Golf/GTI/R32 1998-2002, Jetta 1999-2002, Passat 1999-2001 Skoda Seat Plug & play installation,Jack-Connection,Smart design and Easy to install and use Not work with Navi radio or DVD radio, Not work with audi MMI system. Compatible with: VW 8Pin: 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; 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 Not work with Polo 2004 with single-disc CD radios without MP3 function 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. Control sthe music play and volume by Car radio panel. 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. Please make sure that the U Disk or Memory card is FAT format. Compatible with Audi and VW, Skoda, Seat 8 pin. The Audi 20-pin Adapter Cable should be used to accept the factory connector and plug into the radio. Please confirm the radio interface before you order it. Not compatible with the Navi and DVD radio. Support USB Flash,SD Card and 3.5mm jack input. Please make sure that the U Disk or Memory card is FAT format. The folders should be name them CD1,CD2,CD3...etc