well, they have inputs for RCA sound on the receiver, so if you can output from your machine's audio out (3.5mm to RCA, or RCA to RCA, or digital audio out to digital audio in, or whathaveyou to RCA / Digital audio) then you should be all set. There is nothing xbox specific on the receiving end of the device. As long as you can accommodate one of those input types then you should have no issues using these as headphones on a computer.
Thanks, that helps clear things up. Now I see why the mic is stated to be xbox only.