Great headphones. Good materials, assembled soundly, noise reduction really works, in any case, the noise of equipment in production is removed by about half. With nozzles in the ears, as for me, they even went too far, I have never seen so many. One downside is the app. Do not even try to look for it in the market, it is not there. According to the QR code, a link to a non-working version had to be downloaded from w3bsit3-dns. Com, and that is only in Chinese.