... :MP3 / MP4 Player/Cell phone/Ipad Protection :Short circuit /Over charging protectionCertificated:CE,FCC,ROHSPCB:3 ID resistorsSize:54.5x25mmWeight:15 ... ,stylish design2.Aluminum alloy ring ,difference colors optional3.Standard usb Charging port4.Built-in automatically short circuit,Overvoltage,over current protection5 ...