IMPORTANT: These CD Changers require either a 'brand specific' aftermarket head unit, such as Alpine, Kenwood, Audiovox, etc., or a 'vehicle specific' interface adapter that will allow you to connect the CD Changer to your factory radio. To find out which CD Changer will work with your specific factory radio, go to our interface adapter section and click on the make of vehicle you have. The interface adapters that fit specific vehicles are listed under each make of car.