The headphones that come with this product are non-adjustable. They curve over your ears and meet behind the head. I am only 5'1" and the band of the headphones bang into the base of my neck and are very uncomfortable. Unfortunately the headphones are hardwired into the bottom of the unit, and so they can't be replaced with ones that fit better. The manufacturer says "sorry, that's all we have." Considering that this is their top-of-the line product, I am very unimpressed.If you are under 5'4" don't buy this!The MP3 player itself seems to work fine, although sometimes it doesn't shut off immediately.