... -64GB, 4,Autorun,preload data,available. 5,CE,ROHS,FCC USB flash drivesNo:Ujmd-051(C) SIZE:21(L)X1.9 ... (Diameter) weight:17.5g Detailed Product Description2)The USB 2.0 port( Version ) ,High speed data read and writereading ... least 10 years of data retention8) No external power required; powered by USB bus (4.5 to 5.5V)9) Repeat read ...