Anyway, I agree with beyerdynamics descriptions: the DT 880 are for reference monitoring and the DT 990 are for critical listening and mastering. I did not need a wireless version for the desk phone in the satellite office, so this wired headphone that plugged directly into the phone (PolyCom) worked great. We were expecting a size 11 mens and since this was only a size 9 we are having to find a last minute Christmas gift as a replacement. A good fit for people who have narrow, flat feet. Just a few customer reviews have mentioned problems with charging and its entirely possible that ALL of them may be using a USB source OTHER than the adapter that came in the box. This headset allows me to use my better ear and not deal with pressure on my piercings. They really felt like nice shoes and they fit well as an initial taste. Hard-wired 3m cable. theres more! 4 - You cannot get replacement ear cushions like you can with other models.