I recently sold my '07 Escalade and pulled all the stuff I had installed in it over the years. The Costar Bluestar is a bluetooth module that uses the OnStar factory plugs to allow a person to sync their cell phones to the vehicle and use all of the factory controls when making a phone call like the OnStar does. You can read more on it here: http://www.costartech.com/pb/products/bluestar.html. I just updated the firmware on it and it will come with a USB cable but no manuals or software as this can all be downloaded from their site which is what I did when I got it new. The price is $150 including ground shipping either USPS or UPS to any of the lower 48 states.