The microphone is terrible, I stopped using it because my conversation partners can't hear me at all

It does not have clear sound and they cannot hear me well...
It did not suit me at all and that's why I no longer use it!

Immediate and easy connection, very clear sound, it has nothing to envy from more expensive Bluetooth devices. The only issue is that the charger burned out on the second charge, probably defective. However, for me, this was not a problem, just make sure to have another charger as a backup

It is very good, a slight distortion is present. The microphone, when touching the iron with the magnet, causes a slight tremor in the speaker, although this does not make it bad at all, on the contrary, it is good