You can wirelessly charge through it. I ordered "size 5," but apparently the company lumps sizes 5 through 7 or so as "small". The crackling is starting to wear on me though. This new pair has thinner straps and i feel like evey time i walk it gets tighter around my big toe. The shoes is comfortable and very easy to slip on and off. Very easy to set up, not to clunky, fit Perfectly in my room. No bulkiness and fit right over ears and no slipping Walked to library 1 mile away ears & forehead never felt the coldness I must say that I did slip my Northface hoodie on over head for more warmth Lol! is it failed the Ear Fit Test. The connection only drops out for a second or two, but when it comes back the stereo sound from both earbuds is no longer synchronized. The highs are nicely defined, and arent so over-emphasized that they start sounding harsh or shrill.