content: got these headphones as a gift about a year ago and just started to use them more frequently. sound quality was better than I thought for what I expected from logitech although I feel the noise-canceling feature was weighted in one ear (the one with the battery) and that produces a hiss which is kind of annoying. Then they started to just fall apart. first a little black square panel. then another piece cracked off. actually have tape on them. Within the next year I'm thinking they'll just turn to dust. There are better headphones out there, but if you are dead set on these they don't sound bad.