It fits directly into the jack on the earphone. It fits perfectly and does look cute while being very comfortable. I personally used this for my multiple sessions of 21 day fix regimen as well as routine daily exercises. Very good seller, good communication. Everything was tight, smooth and it never rattled or shook. These shoes are very pretty, comfortable and durable. Extremely brittle. It was in development for 8 years, and it seems CDPR have failed, I dont blame the coders, this can only go straight to the CEO of the company. What a great addition to our wall by the door to hold hats, now masks. He had an old pair, (3+ yrs old) that he loved and wanted the exact same sandal.