Best earphone 1.pass ISD, RoHs , CE etc 2.good quality and reasonable price earphones | mp3 earphone line | in-ear earphone, best earphoneDecription :1.pass ISD, RoHs , CE etc2.good quality and reasonable price3. Driving Unit :9mm / 6u4. sensitivity :104dB5.frequency scope:20Hz -20 kHz6. impedance :16ohms7.rated power : 5-10 mw8. MOQ:500pcs9. payment : T/T, L/C, Western union