Theyre fine, but they do feel a bit lightweight and flimsy, nothing to worry about at the lower price. My surgeon attempted to take care of the issue under local anesthesia, but to no avail. As far as sound. The desk seems okay. All it is is a magnetic strip that is super strong. Un très bon casque d après les tests youtube , un très bon casque d après moi ! 500mAh. I have found when talking on the phone while using the Bluetooth, along with the built-in mic, people say they are noisy. The size is bit smaller than usual, She usually wears 6. This was supposed to have cellular data as well.