This is the legendary Shure SM58 with an on/off switch.
From Shure:
If you’ve ever heard someone sing or speak into a live microphone, there’s an excellent chance it was an SM58. Rock stars. Pop idols. Comedians. Presidents. Popes. Immortal words have passed through its iconic grille for generations. And with engineering and durability that set the world standard, it’s sure to keep turning up at legendary performances.
