The Bluetooth connection (Cootree 220) is fast and fluid, so even in my pocket I did not break his or crackling.
Speaking of sound, it's very good, clear and suits me well.
For cons, I find impractical arch, it is possible to adjust the size. It makes it a little wider for me but it does not fall so far when I run.
I have not used the microphone even though I know that it exists and therefore do not comment on it.
