Most is really the bluetooth mode that lets you listen to his music or to participate in a telephone conversation / Skype (thanks to the integrated microphone) ... regardless of the wire or the location of his phone! Very convenient when you do not want to have his big smartphone in the pocket, in the hand, or when you're on Skype on a PC for example.
(Having a headphone jack disconnects which is significant even if we do not use the bluetooth fashion to the extent we can always replace it if it is cut, unlike wired headsets or changing the wire is still laborious and synonymous with garbage for the entire helmet in a large number of users!)
Manual controls on the headset to adjust the volume, change songs or accept / end calls are really appreciable.
Warning to the hoop which can be a bit annoying after a while but just move it a little to relieve discomfort.
Recommended!