So, then, getting back to the topi I can get any little microphone plug in and it will work? As is, they are universal?
any mic will do, however, buyer beware. not all mics will function well in large classroom settings. mics designed for dictation won't pick up the professor even a few rows away, and some mics designed for large rooms pick up excessive noise. that's why i recommend reading some reviews on amazon or epionion or something like that before you buy one.