DESC: The MOTOPURE H15 features Motorola's CrystalTalk for Headsets noise canceling technology, which cancels background noise, enhances your voice and channels pure, clear audio directly into your ear. The headset's version of CrystalTalk technology--previously only found in select Motorola handsets--is always on to enhance the audio experience without any sort of user intervention. The MOTOPURE H15 uses dual microphones to separate your voice from background and wind noise, enhancing the your voice, and channeling clear, natural sounding audio to the caller.