I ordered the Bluetooth headset because I often on the phone and after some time I always have to take the cell phone n the other phone so I do not drop my arm. However, I wanted to spend a fortune for it and not have decided on the Call Stel. Delivery was fast as always. A small German description and is the connection with my Samsung Galaxy S5 went without problems. The unit is very comfortable and does not press on or in the ear. The quality is absolutely satisfactory. I understand the interlocutor very well and my interlocutors also understand me very well, sometimes even better than before (which have stated).
So I would buy me the unit again and recommend it.