Be careful to connect bluetooth record is not very explanatory: a long press of 8s on the button turns on the headset, the green LED flashes slowly, about 1 times per second, then you have still a long press over 8s in fact until the green light starts flashing very very quickly, this time you can start the search on the PC / tablet. Furthermore the USB cable is only for charging the headset, in fact the microphone is not working when the headset is connected via USB. The sound quality is not too bad but it is not a HIFI headphones! More than enough to use a cat / lync / messenger and a little music. The scope of Bluetooth is about 15m in free field. In summary an excellent quality / price!