When reading other reviews, I have that the biggest compliant about the H9 was that it fit too deep in the ear canal which was very uncomfortable.I still purchased this item since in the past working with ear plugs in was just another equipment used each day.Upon receiving the H9 it was exactly like the reviews. I charged it up for 24 hrs. and began to use. The earpiece was a snug fit in the canal and there was no need to fear it falling out.I called my voice mail and listened to the most clearest recordings I have ever experienced with a bluetooth. The problem comes when I am trying to talk to someone else. It has been reported that they are unable to make out a single word. I had to drop many of important calls in which where contract based. I called and left a message on my own voice mail and then tried to listen to it, no luck could not even tell that it was my own voice.I immediately contacted seller in hopes that I just had gotten a defective H9 - possibly the microphone out on it. I received the replacement just to find the same problem. I do not recommend this product for the money the Jawbone or Jawbone 2 is a better choice.