Features •  Highly effective noise isolation •  Especially designed for active lifestyles •  Sensitive microphone for clear conversation •  High performance sound earphones in portable    compact design • Gold-plated 3.5mm connector provide excellent audio    signal transmission •  Designed with ergonomic silicon in-ear ear buds for    comfortable using •  Ideal for used with MP3/MP4 player, CD, DVD, MD  player,    iPod, iPad, iPone, most mobile phones, PCs  and portable    audio devices Specification •  Drive Unit: 10mm dia. •  Impedance: 32±10%Ω •  Frequency Response: 20Hz~20KHz •  Sensitivity: 103±2dB /1KHz •  Maximum Input Power: 100MW •  Connector: 3.5mm gold-plated stereo plug