During a telephone conversation I can my interlocutors also at least hear exactly as good as the original headphones, and my interlocutor understands me very good as well.
If listening to music is a call, the headset provides first the music quietly and then you hear the ringing and can take the call. The ringtone itself is heard through the headphones and also on the phone, so that you can even hear the ringing, if you have connected the headphones, but the headset has not in the ear.
The "remote control", in which the microphone is integrated, has only one button, so you can pause the music and resume, and titles back and projecting. In addition, you can answer and end calls with it, which was important to me. The volume can not govern with the remote control, but only on the phone.
I got the headphones very inexpensive and can be used as summary only say: thumbs up and I would buy it again.