Getting the small ends of the padding to sit nicely under the connectors can take a few attempts, but is THE thing for a seamless finishYou can do it. 5 mm headphone jack no luck on either. The one I kept is small but Im trying to stretch it bc its the biggest of all of the same size. I sent these back and ordered the Tritton Katana HD 7. so it took a while to determine that the adapter had died. At best the trainer can be used to pass some time for the casual bicyclist who is bored one day and decides to shake off his or her boredom by training with this trainer. (Totally my fault! I love the color, look, and they arent clunky. That all change as soon as I tried on my new Sketchers. Don?t work