Car multimedia refers to various electronic devices and functions integrated inside a vehicle, including audio systems, navigation systems, communication systems, information and entertainment systems, etc. These devices allow drivers and passengers to enjoy music, obtain real-time traffic information, and engage in voice communication while driving. The in car multimedia system can also complement other functions of the vehicle, such as air conditioning and seat adjustment, to provide a more user-friendly driving experience. The important components of the in car multimedia system are usually located on the most prominent display screen of the car center console, which includes music and video playback, Bluetooth phone, in car WIFI function, GPS navigation function, reverse image, etc. High end models even have some assisted driving functions. With the continuous development and progress of technology, the functions of in car multimedia systems are becoming increasingly rich. From the initial cassette tapes and CD players to TF cards and USB, it is now a multifunctional central control system that integrates navigation, audio and video systems, computer systems, and internet access. It is like a tablet computer, with rich functions and wide applications, and has become an indispensable and important component of automobiles. The central multimedia system covers entertainment and audio playback, navigation system, air conditioning adjustment, call system, in car information feedback, etc. Moreover, all aspects of the car's settings and adjustments can be controlled through the central control screen.