Short range... The breaking starts at 4-5 meters.
Microphone for crying - my interlocutors hear people talking 10 meters away.
Not very loud. I had trouble hearing my interlocutors when people were talking 3 meters away.
Multipoint pairing, when you change devices, you pray for it to play on the new device without restarting.
At least they are cheap. I will keep them as a backup and get something more serious

I broke a pair of headphones that I have and I decided to replace them with these. Maybe if I didn't know any better, I wouldn't notice the difference because even though I paid almost the same amount of money, I'm not completely satisfied. Their range is not as far and the battery doesn't last me all day (I have them around my neck all day). They are a bit more flexible than I would like, but at least they have good sound quality and work well otherwise. I don't regret buying them, I just won't use them for everyday use since I really wish the battery had a longer life.