... ,MP3,MP4,PC 1,CE, FCC ,RoHS compliant 2,OEM & ODM 3,Top sound quality 4,MOQ:5000 pcs ... discomfortPackaging & Delivery Packaging Detail:Tube packaging,PE bag,Blister case, and OEM/ODM availableDelivery Detail:25-45 working days after receiving ... use· Optimised for portable audio including MP3, CD players, iPad, iPod and iPhone. Specification Drive unit 9.2mm Impedance32ohmSensitivity-100dBmFrequence ...