What does 'radio' mean when it appears on the car?

[AngelinaLee]

The 'radio' on the car refers to the radio function. The functions of the radio and media buttons are as follows: Functions of the radio: The car radio is an initial audio entertainment configuration in vehicles and one of the common configurations in car audio-visual entertainment systems. It is a radio and playback device designed to alleviate the boredom of drivers and passengers during travel. The earliest car radios used AM (amplitude modulation), later evolving to AM/FM radios, tape players, and further developing into CD players and compatible DCC and DAT digital audio systems. Other car media buttons: The MODE button stands for mode selection, allowing users to switch between different multimedia sources, such as AM, FM, and USB modes. The SEL button is the abbreviation of 'select,' serving as the menu selection confirmation key. The VOL button adjusts the volume level, derived from the English word 'volume,' meaning sound level.