Skull earphone for iphone,MP3,MP4,PC 1,CE, FCC ,RoHS compliant 2,OEM & ODM 3, ... provides a secure and comfortable fit even for extended use· Optimised for portable audio including MP3, CD players, iPad, iPod and iPhone. ... unit 9.2mm Impedance32ohmSensitivity-100dBmFrequence range 20-2khzFunctionstereoWiresTPE cableUsageIpod,Ipone,MP3,MP5,CertificateCE,Rohs,FCC skull earphone for iphone,MP3,MP4,PC