Didn't understand what it was. Took it back to the store. There was an idea to try them again (another copy), but probably still not. 1 star because they don't do their job. With its pros: They fit perfectly on the head. Ears don't get tired. Not heavy, but, in truth, not fluff. Design is ok. Has some cons: Very quiet ears, when I abandoned the Arctics and put on the old ones, I almost went deaf. The sound is nothing special. In my copy, the microphone was extremely quiet. Gain barely saved the situation and brought a lot of noise. The equalizer in the app is useless. The only function that works is listening to the microphone. I didn’t really like the plastic of the headband - it’s hard when you put it on the table - it knocks, but this is quite a trifle.