... brands 3. Supplier with highest quality professional in-ear stereo earphone MP4.Specification:1.Speaker: 10mm2.Frequency response: 20Hz-20,000Hz3 ... color for mp3,mp4 player and mobile phone and iphone ,ipod … 2.advantaged price and high quality for mass purchase 3 ... earphones, metallic earphones. and othersStyle of earphones: in-ear earphone, headset, headphone,mp3 earphones If you want to know more ...