Microphone input on top of the DSO Nano??

There is a tiny hole and the word “MIC” on top. Is that for fun, just to view one’s own voice or something? I can’t figure out how to access it in the menus.

If you are not familiar with what the DSO nano is, then its a oscilloscope in a mp3 player shell, go figure! :wink:

relic from its ancestor…