Plug and play into the factory radio wire harness.  
Allows installation of an aftermarket radio using the existing factory wiring and connectors.
No cutting of factory wiring is needed.
Works with select vehicles only.
Metra 70-1784 or equivalent depending on stock availability.

Vehicle Compatibility:

Audi:
1996-1999 A4
1997-1999 A4 Avant Wagon
1997-1999 A6
1997-1999 A6 Avant Wagon
1997-1999 A8
1997-1998 Cabrio

Ford:
2003-2004 Focus with Blaupunkt radio

Pontiac:
2004-2006 GTO

Volkswagen:
1998-2008 Beetle
1995-2002 Cabrio
2002-2003 Euro Van
1999-2002 Golf
1995-2001 GTI
1995-2002 Jetta
1998-2001 Passat