In Ear Earphones Speaker Dimension:10mm lmpedance:32Ohm Rated power:15mW Sensitiviy :105dB S.P.L at 1KHz In Ear Earphones,ear buds,mp3 earphone,mp4 earphones, in-ear headphones,ear buds ... ,in-ear headphones.Speaker Dimension:Ø10mmlmpedance:32OhmSensitiviy :105dB S ...