AUX-FIAT is a system that was developed by the Italian car manufacturer, Fiat. It is designed to allow owners of Fiat cars to add on-board sound systems and integrate audio components into their vehicles. It works by connecting an auxiliary input jack to the vehicle's audio system and providing power to the audio unit. The AUX-FIAT system allows users to control the sound system, adjust EQ levels, and access a variety of media including MP3 players, digital audio players, satellite radios, and traditional radios. The system also includes a remote control unit, which controls the audio system, volume, and source selection.