MYBAT Stereo Handsfree Headset 014 for Samsung Micro USB - Retail Packaging - Black Frequency Range: 20Hz~20kHz Sound Pressure Level: 107dB Plus or Minus 3dB/100mW Total Harmonic Distortion: Greater Than5,(Input Power: 10mW; Frequency Range: 20Hz to 20kHz) Crystal clear and high quality voice for both talking party, noise cancellation, high-velocity element for excellent stereo effect. See description for all compatible phones