2000 - 2001 - 2002 - 2003 - 2004 Ford Focus & Mercury Cougar Radio AM FM CD Player w Auxiliary Input Added to the Face for use with iPod, iPhone, mp3 Players, Satellite Radio, Android Phones and more! Anything with an Auxiliary output is compatible! Part Number: 1S4F-18C838-BA Compatible Part Numbers: XS4F-18C838-BB / XS4F-18C838-BA. Please confirm that these are the plugs that you need before purchase as there is another version of this radio that used a different, incompatible sound system. This is for a 2000-2004 Mercury Cougar and Ford Focus AM FM CD player that has been professionally remanufactured and upgraded with an aux input by our staff here at our Richmond location. With the auxiliary input, you can listen to any music device with a 3.5 mm headphone or auxiliary out in full quality, the way it was meant to be heard! Operation is a breeze, just plug your 3.5 mm cable into the radio and you will be listening to your music through all your speakers with full control of bass, treble, balance and fade! We wire the input directly into the radio's preamp so there is no static as commonly heard with FM modulation. In addition, since the input is right on the face of the radio, there are no clumsy breakout boxes to install and mount. When the aux input is not in use, the radio will function as factory! This radio has been remanufactured, upgraded, cleaned, thoroughly checked and then checked again before shipment. No codes required, it will plug and play!