... :IW-MC03Ring color:Changeable Usage:MP3 / MP4 Player/Cell phone/Ipad Protection :Short circuit /Over charging protectionCertificated:CE,FCC ... ,ROHSPCB:3 ID resistorsSize:54.5x25mmWeight:15.5GSpecification 1.Small exquisite appreance ,stylish design2.Aluminum alloy ring ,difference ... ,Overvoltage,over current protection5.Work with Iphone,iphad,mobile phone 6.CE,FCC,Rohs ApprovalProduction photos