EP0158G Features Cute slippers shaped ear adapters Super bass sound quality In-ear headphone design General Specs Sound Super bass sound quality Earphone Type Wired headset Impedance  32 ohms Frequency Response 20Hz-20KHz Sensitivity 118db S.P.L at 1KHz Connector 3.5 mm audio jack Speaker Diameter 30 mm Cable Length 1.0 m Rated Power 3mw Max. Power 15mw Compatibility MP3 player， MP4 player， personal CD player， PC， laptop