Multifunctional Android 4.4.4 2002 2003 2004 2005 2006 2007 2008 Audi A4 S4 RS4 Radio GPS navigation dvd player with auto A/V audio system. For more information in this link: http://www.seicane.com/oem-1024-600-android-2002-2008-audi-a4-s4-rs4-car-stereo-radio-gps-with-7-inch-touch-screen-bluetooth-music-1080p-dvd-player-steering-wheel-control-mirror-link-s09050. App download : It is the fashionable replacement of your factory radio with Android-based system of great utility and maximum scalability. a lot of application can be downloaded in the Android Market,such as Skype, MSN, YouTube,twitter,e-books,Gmail etc. You can also install or remove any apps on RAM or SD according to your preference. Send a picture of your car's dashboard with the year and model enclosed to our [email protected] now, and our pre-sale service team will check if this system work with your car. Wish you like it.