It is about the size of my finger and fits nicely into a carved out spot on the back of the unit. Works well but not for quite conversation as the other party may have problems hearing you if you speak too low. Those were alittle cooler for the summer heat and would recommend those for the season if you work outdoors. I just received it today and it works perfectly. If you have a problem like me, you are screwed. I had to wear bandaids! So far charging with the Buds has been as easy as advertised, both wireless and wired charging works great. They are fun to use and as long as you recognize the limits you can create some cool tracks. These are narrower and fit slightly smaller than normal Hurricanes. My gripe is that while the back half of the shelves are meant to be adjustable (there are 2 hole positions), the front of the shelf is not.