The device fits uniquely in the ear canal without causing discomfort over time. And they dont even sound very good when connected to my computers sound card compared to my Grado PS500 headphones. I wish there was a standard across all headphones. At first, the top and bottom almost match up and after a few days they’re pretty nicely matched up. They were even worse and didn’t even come with a charger and now I can’t use any of them. The minute I saw the valve head, I grew very discouraged. My parents have 2 also that they use with the TV sets (they got a TV plugin that lets it connect to bluetooth). Comfortable and just dressy enough for work when I have a lot of walking I washed them and dried them and they fit back to normal again, for a day. Touche facile a jouer et à écrire.