Hot Pink Style 1 Stereo Handsfree Earplugs Headset Mic Microphone for Samsung SGH-A237, SGH-T339 / T336, SGH-T229, M200, Ace SPH-i325, BlackJack II SGH-i617, SLM SGH-A747, M520, SCH-R500 Hue, Blast SGH-T729, Beat S SGH-A737 / SGH-A736, SGH-T439, Katalyst SGH-T739, Access A827 Frequency Range: 20Hz~20kHz Sound Pressure Level: 107dB?3dB/100mW Total Harmonic Distortion: &lt;=5,(Input Power: 10mW; Frequency Range: 20Hz~20kHz) Crystal clear and high quality voice for both talking party and noise cancellation Light weight and easy to carry