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 70-5521 or equivalent depending on stock availability.
This kit also comes with the subwoofer retention harness.

Vehicle Compatibility:

Ford:
2004-2007 Escape (seven speaker system w/ sub)
2004-2005 Explorer

Lincoln:
2005-2008 Mark LT

Mercury:
2004-2005 Mountaineer (Audiophile w/ sub)