I have only been using it for a couple of days, the sound is wonderful, they synchronized with each other as soon as I took it out of the box, there were no problems with the phone either. They sit well in the ears, although they are rather made for large ears, they did not fit my wife. The case does not cause any complaints, it is made soundly and does not play anywhere. The material is most likely aluminum with a plastic cover. Light indication of the charge level of the case and indication…