Mybat Diamante Stereo Hands-free Headset 3.5mm, Pink for Apple iPhone 3GS iPhone 4, Samsung Captivate i897 Epic 4G D700 Fascinate i500 Nexus S i9020 Vibrant T959 Universal 3.5mm Jack - Compatible Models: Apple, Casio, Cricket, Dell, Hewlett-Packard, HTC, Huawei, Kyocera, LG, Motorola, Nokia, Palm, Pantech, RIM BlackBerry, Samsung, ZTE. Frequency Range: 20Hz~20kHz, Sound Pressure Level: 107dB3dB/100mW Total Harmonic Distortion: &lt;=5,(Input Power: 10mW; Frequency Range: 20Hz~20kHz) Crystal clear and high quality voice for both talking party, noise cancellation, high-velocity element for excellent stereo effect.