The quality of sound from the headphones is amazing, especially the low side !!! Pairing is a formality simpler and autonomy is really great. I love the active BT receiver option, which allows you to connect other corded headphones or other auxiliary input on it to share with other listening devices simultaneously. Other strong points: Can be used in wired without battery with a still significant sound quality. At critical: - The helmet is super open type. So what you hear, around you too .... In 0 clear discretion. - The total plastic hoops are a little cheap, although I do regret any break after 2 months of use but in my opinion it is better to be careful on this point. - Last criticism but which concerns only myself I think, for a long term use, really too strong support headphones on the point or it becomes annoying for my taste. After a pause, no recovery concern, but ultimately, the helmet is never forgotten, which is a shame for me. Without anti-pub, I was offered a meantime August EP650B Stereo Headset Wireless Bluetooth 4.0 NFC Circum aural - Earphones with integrated microphone and rechargeable internal battery - Compatible with Mobile Phones, iPhone, iPad, PC, Tablets, smartphones etc. also on sale at Amazon, which still costs a little less than double the price of this Bluedio HT but that is clearly above on a lot of points (including the comfort of use). If you have a little more budget to put in your purchase of BT headphones have a look at the EP650.