Razer was one of the few makers that seemed to support OSX well with their software driver. Soundstage is poor, imaging is quite bad, low end lacks extension, mids are recessed, highs are ok, but also lacking in extension or any kind of finesse. Of course you can power on/off by holding down the single pressure sensitive center of each earbud. All the heads are easy to change and clean under running water. Excellent and highly recommend. I lovedddddd all these colors . Different manufacturers seem to have different sizing, which is why we thought 40 were the correct ones. I was looking for easy slip on shoes to get various small tasks done. Does not take up too much space. Its very wide, which for me is a big bonus.