My first test was to check that the microphone was working ==> No problem at this level.
My second test was to check the sound ==> Loss of volume and quality sound.
My last test was to check the functionality of the remote control (+ / - / Talk) ==> No button works
Overall I have what I wanted, ie the microphone.
For black mark against the sound and remote control.
I noticed that when I stood pressed the button clinch the quality of his returning to normal but hey impractical.
Conclusion: Although for calls but bad for listening