, an audio head unit, also known as a car stereo or car radio, is a central control unit in a vehicle's audio system. It allows users to select audio sources, play various media, adjust audio settings, and interact with the audio system through a display screen and control buttons or touchscreen. Modern head units may offer features such as Bluetooth connectivity for hands-free calling, smartphone integration, navigation, and integration with vehicle features. Its main purpose is to provide entertainment and convenience while driving, allowing users to enjoy music, radio, and other audio content while on the road.