What's the littlw hole between the camera lens and flash on iPhone 5?

Between the lens and the flash there's a tiny hole. I just bought a magnetic camera lens to fit on my iPhone 5 and wondered what the hole was before I covered it with a magnetic ring. Thanks

Added (1). If the metal ring that the magnetic camera sits on covers this will it stop calls, videos etc from working?

It's the microphone

That is the microphone.

  • Photojojo camera lens for the iphone? I was planning on getting the photojojo magnetic camera lens for my iphone 5 and i was wondering if you can take off the metal ring after putting on your camera lens. Like if you have finished taking a picture with your camera lens and you take the lens off, can you be able to get the metal ring off when it is stuck to your phone by the camera? Or does it stay there forever? Please help me! I really need to know this else i won't be abe to get it!
  • My iphone 4 camera lens doesn't work I can take pictures but its blurry and its not as clear. I don't know if i should get a new phone! I can't see any cracks or scratches on the camera but when i take the picture its all blurry. I have tried to clean it but it doesn't work?
  • Is tbere any major différence between thé iPhone 6 and the 6s? Whooppeee is Xmas again and my daughter wants new 2nd hand) iPhone… 2 years ago almost bought her 5 before i réaliséd that it was 5s she wanted ( cos thé 5 sucks?) And I don't want to screw up this year…
  • IPhone fish eye camera lens? I just ordered this fish eye lens for my iPhone 4 and I'm trying to assemble it. It has magnets and it says to glue one magnet into my phone but there's no glue or sticker to do so. This is getting really frustrating and I need help on how to assemble it. I can't find ANY websites that know what they're talking about.