This helmet (which I received a few days late but good with the vagaries of transport I do not hold it against) has a rather good sound, it is light and Bluetooth connection is easy. All in all a decent article. I just put two caveats: 1 - arch seems to me a tad brittle (a view in time) 2 - correct the description sheet as it indicates "Headset Microphone / Micro SD Music" or there 's no micro-SD port on the helmet (it is found on the Bluedio H +) so small disappointment when I received.