Have the headphones for several weeks now in use, regardless of whether a workout in the gym, jogging or biking. Always and functioned with a great sound! I tested the whole thing with my Lumia 930 and the Xperia Z from my girlfriend. Sometimes, however, in coupling the device a few problems and that the headset is off again and on again, so that truly sound is output. (Although the feedback of a successful coupling has been issued and is also displayed by the mobile phone). One should also make sure that you start not started playing after the fresh pairing. If you start a fresh song after pairing, boils Super and without a single disconnection since use!
