In cars, the "Folder" typically refers to a function that allows users to switch between audio file folders. It's a dedicated button for car audio systems. In simpler terms, if you have created two or more audio folders, pressing the "Folder" button will enable the audio system to switch to and play the audio from the next folder, facilitating a song switch. It's worth noting that some cars label this button as "Tune Folder."
Meanings of other buttons on the car audio system:
1：The "PWR" button - a short press activates the audio device, while holding the button for about 1 second will shut the audio system off.
2：The "AMS" button, when the audio system is in radio mode and this button is pressed for more than 2 seconds, the stations that the audio system picks up will be automatically saved in the 1-6 preset stations. In MP3 mode, pressing this button lets you select the MP3 menu.
3：The "MUTE" button, when pressed, mutes the car audio system.
4：The "SEL/AF" button can be used to switch the audio system's band, such as from the AM band to the AF band.
5：The "LOUD" button adjusts the loudness of the audio system, and when used appropriately, it can enhance the listening experience.
6：The "SCAN" button scans through radio stations.
7：The "PAU" button - a short press plays or pauses a CD. Holding it down makes the audio system restart the playlist from the first song.
8：The "RPT" button mainly enables the repeated playback of songs.
9：The "RDM" button is mainly used for random/shuffle play of songs.
Additionally, car designs vary, so some vehicles might not have all the buttons mentioned above. Users should refer to the actual configuration in their vehicles. Also, some buttons need the audio system to be in a specific mode to function. For example, the PAU, RPT, and RDM buttons might require the audio system to be in CD mode to work. If some buttons don't seem to respond, it's possible that the audio system isn't in the right mode; switching to the correct mode should resolve the issue.
