Product Size Approx. 2.4 x 2.0 x 3.5 inches Main Materials/Materials PVCIncreases one port to four patible OS Win10 8.1 7/Mac OS X 10.9 Interface USB2.0/1.1 Transfer Rate USB2.Mbps USB1.MbpsPower supply method bus power Supply current 4 ports total within mA 1 port total max mA. Cable Length cm Ages 15 and upC Sanrio Co. Ltd. P