BoxWave PalmOne Treo 650 Dual Handsfree Stereo Headset (Black) High performance sound earphones in a portable compact design Wide frequency response: 20Hz to 20,000Hz Neodymium drivers provide 5 times more power than aluminum, cobolt, or ceramic drivers! Premium gold-plated headphone plug reduces signal loss and ensures maximum performance Includes an integrated microphone, single-touch answer call button, volume control, and switch for toggling between music and handsfree phone mode