It's a Rii Mini Keyboard i4, and my concern is that it's a microphone. I just noticed the hole and think I'm probably wrong in what it is considering how big a deal it would be if it was a mic that isn't advertised.
What could this hole be for or what is it? Thanks in advance, hope this doesn't violate any rules.
Injection mold tooling is expensive ($40k+) and PCB iteration is cheap. Its especially hard to add holes to existing plastic parts as that requires adding material to the tool (as opposed to cutting material away). It's possible a past prototype or future version had/will have a microphone. Or they just wanted to keep their options open.