Little Hole On iPhone
If you have an iPhone you probably noticed that small hole next to your camera lens. It’s actually a mic. There are three mics in total one every smartphone. This one, one on the bottom edge of the phone and one under the speaker.
Zigzag On Bobby Pins
Even if you’ve never used a Bobby pin before you would have noticed that it has a straight side and a wavy side. The straight side is to slide it into place and the wavy side is what keeps it in place.