After trying a Parrot Zik (good, but the bluetooth does not work with all devices, ok with my iphone, but nothing to do with my MacBook air!), A Beats Wireless (I did not like the sound at all very crushed, yet I was looking for a helmet rather Basseux) and the wired version of the Sony MDR-1RBT (big problem of the jack, not adjusted with the cords, generating very unpleasant noise when you move the head) I finally found my happiness with this Sony Wireless !!! Good sound, good bass, (as well as medium and treble), Dynamic, comfortable, worry-free pairing with my devices, thank you Sony!