Stereo Dynamic In Ear Earphones SY-S66: Type: in-ear dynamic 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: 1.5mm Jack: 3.5mm