Unbelievable battery life. Acceptable all other characteristics. 3 problems:
1) It disconnects when you put it in its case, so it takes 2-3 seconds to connect when receiving a call and then you can answer. However, because of this feature, the battery lasts for weeks.
2) The button is touch-sensitive and you can very easily, while trying to put it better in your ear, accidentally end the call.
3) Recently, I wore it while sweating a lot, sweat got into its contacts and since then it has been malfunctioning.
I would definitely buy it again

It is not functional at all and does not connect easily at all. After two days of use, I put it in the drawer.

The product is good only to drive you crazy. While you're talking, it opens and closes on its own... Unacceptable... Money wasted

I have had it for 3 weeks and I didn't want to make an evaluation from the beginning but really for their price they are worth ten stars. Overall, as for sound quality and call and music, it is average, the person you are talking to hears you relatively well, for sure the more expensive ones are much better, but for its price it is very decent, if it cost 30 euros I would definitely judge it worse. It plays music or you can talk continuously for 5 hours, for me with 2-3 hours of music and one hour of talking per day, I had to charge them after 8 days and I mean in the socket.
Another crazy positive thing is how comfortable and convenient it is in the ear once you put it on correctly, because at first I didn't place it correctly in my ear, and this compared to previous ones I had, where I always used in-ear headphones (a big fan, because the old ones before the in-ear ones used to tire my ear and bother me when I had them on for hours). Because my ear is a bit oily always (not dirty), they used to fall off, but with this one I put it on and forget that I have it in my ear and it doesn't fall off for any reason no matter what work I do, it doesn't bother me, I don't feel it.
The only annoying thing that I haven't found yet is that the language keeps changing to Chinese and it's annoying, the instructions say it changes with 2 taps but it doesn't change, if someone knows, please answer my question, thank you