Quality sound correct great, good rendering of bass and good aigue.Le headset is paired in a few seconde.Au level of the battery duration nothing to say I have the headset for 1 week and a half, I've used at least more than 8 hours and I still do not have rechargé.La output power is great (I'm surprised myself), sound insulation allows cycling with and hear the external vruit -> Security !!! (Except when the volume is at max ....) At the level of comfort I used 4H continues without pain, I also made the race test foot on carpet and helmet stand very well on the head, I have not called once by place.en a word purchase you tighten delighted
