I bought these headphones there is a good year. He follows me everywhere, folded in my coat pocket. It has a good battery that does not require me to recharge every day or even every week. It maccompagne in my trips by metro or on foot easily and at least 5m my mobile. Comfortable to wear, adjustable. Impeccable. To be absolutely perfect, I would have liked not to have too strong indications sound when the volume is at the bottom. Micro side, it makes the echo, the flat because it is not very pleasant for the interlocutors. But before I had another helmet that was much worse ...