A car stereo is an electronic device installed in vehicles that plays audio from various sources, such as radio, CDs, or digital music files. It typically includes a display screen, buttons, and speakers, allowing users to control volume, change tracks, and select different audio sources. Modern car stereos often support Bluetooth connectivity, enabling hands-free calls and wireless music streaming from smartphones. Many car stereos also come with additional features like USB ports, auxiliary inputs, and compatibility with smartphone apps. Some advanced models offer navigation systems and touchscreen interfaces for easier access to functions. Overall, a car stereo enhances the driving experience by providing entertainment and information on the go.