Powerful ferrite magnets for enhanced audio clarity and acoustic fidelity.?Fashion design, enjoy maximum sound quality experience, and sound sense of hearing ART.?Durable plastic hook construction for maintenance-free durability.?Frequency response of 18 - 20000 Hz.?Sensitivity: 16dB.?Impedance: 32 ohms.?Ideal for use with iPod/MP3/MP4/MD/CD/Nitendo DS/Walkman which has 3.5mm plug device;?Included one pair of comfortable soft sponge cover for great feeling;?Weight: 40g.Enjoy hands-free listening with this universal 3.5mm In-ear Headset.Non-OEM product.Available colors are White,Black,Blue,Green,Pink,Purple,Red.