I am one of those entrepreneur who constantly lose their oreilletes. So, it looks more easily to the first prize. On the last lost when I had to shout to hear me that one I decided to pay the price. This product is miraculous. I do not know that technology they use but I did the test call me and leave me a message on the answering machine; I am in my car window open, in a park or on the street, I mean explicitly and with a very good quality. To listen, it's simple, it's the first oreillete that uses the audio level from my phone to month 25%. All the others, I had to press the volume up to ensure the maximum level. I have not taken for its audio function, but again the sound is amazing. When the distributor, I received the package the day before the scheduled day. Soon I am to be an exception, but I am pleasantly suprised the whole. Recommended for all those who use mobile excessively. (Coupling with BlackBerry 9600)
