Stereo In Ear MP4 Earphones SY-J282: Speaker: ¦ 10mm lmpedance: 32ohm Sensitivity: 108dB S.P.L at 1KHZ Frequency Response: 10-22, 000Hz Rated POWER: 3mW Max.input power: 30mW Cord Length: 1.2m JACK: 3.5mm