They are not suitable for music. I measured them with an equalizer. 32 Hz, 61 Hz, 120 Hz, they don't play anything. They only play from 250 Hz and above, but not clearly. In other words, the bass is 0, the mid and high frequencies are there but not clear. The sound quality is approximately the same as the basic Samsung earphones that used to come for free with the phone. They are not recommended for music. If you want to listen to music, it is necessary to get headphones. I don't know about their use for phone calls yet, I will come back to that. As for the positives, I appreciate their functionality. As soon as you put them in the case, they disconnect, and as soon as you take them out of the case, they automatically connect again. You can use only one of the two earphones. Additionally, the case has a battery and charges them

Very good headphones, at first I had a problem with the sound (couldn't hear well) but after adjusting the settings in the headphone menu, everything is perfect! Good sound quality, fast installation, and good application!

Unfortunately, they don't listen to you very well when you speak and they don't have much volume in the music. They are a bit uncomfortable in the ears, they bother me after a while, but this may also be an issue with the anatomy of the ear. The battery lasts a long time and there are no disconnections.

Do not be fooled and buy them, they are completely useless. You can't hear your interlocutor at all. Just a waste of money. I returned them to the store because I thought they had a problem, but even the new ones did not improve the sound quality

Although I have only been using it for 3 days, the most impressive thing to me is that you forget you're wearing it. Despite not feeling like it fits well in the ear, with everyday use, it has a good fit without coming out of place. The sound is clear and the volume doesn't create any problems with listening. The microphone is satisfactory as well, as I've been told that people can hear me properly.

Excellent build quality. The sound is as loud and clear as needed for a conversation even in a noisy environment. The volume in music is not too loud, but the audio is rich and has depth without overly emphasized bass.
The best purchase of Bluetooth headphones I have made.
As a plus, there are no disconnections and the battery life is long.