Handsfree Communication
This guy came up with this after noticing that Brazilians always find the most inventive methods of accomplishing tasks. He needed to keep his phone within reach while avoiding holding it in his hands or placing it in his pockets, so he devised this.
This clearly demonstrates hands-free communication, but isn’t it also an example of headphones? Do you understand what I’m getting at? Headphones? huehuehue