Initially wired design like a phone earphones, but with careful study I understand that the wire does not mate with a mobile device and the headset, in fact, presented whole accessory without any mechanical contacts.
Often, wanting to make a miniature tool, manufacturers are sacrificing functionality of the device. But the team SVEN came up with the best out of the situation and issued in the form of a Bluetooth headset SEB-B270MV. Fans of minimalism will appreciate this gadget highly. All functional filling is hidden, no bulky mechanisms, and the device itself takes up so little space that I wonder how all this managed to accomplish the manufacturer.