Why the iPhone has a mysterious little hole next to its camera

The iPhone has a hole next to its rear camera lens. It's easy to miss because it's so small, and you might never have noticed it before, let alone wondered what it's for. However, the hole actually serves a very important purpose. It is, in fact, a microphone, one of three on the device. The I.F.O. is fuelled by eight electric engines, which is able to push the flying object to an estimated top speed of about 120mph.