An adapter does come with the package but it makes both the length and weight quite undesirable and may cause undue internal stress at the site of the port. I can see that Sony put here not the best NC technology they have, and it is logical. He?s rough and breaks them. Product worked great and I loved it. In fact, they were exactly like the regular footbed Boston Birkenstock and I couldnt tell the difference when wearing them or my Bostons. Love these headphones, tiny and soft. These look great w pants shorts or skirts, the heel height is high enough to not look like a " sensible" shoe, but not too high, or too steep of an angle. They just were not supporting my feet correctly for some reason. My suspicion was right because the instruction manual have some writings/pen markings on it. Not as advertised very disappointed