MDTC-6001 Combo card readers and usb hub all in one, 1, 4 slots :SD,M2,MS,TF slots 2,3 ... -6001 Combo card readers and usb hub all in oneSupports:USB2.0 and 1.1,the transfers speed is up to be 480MbpsSupports:It has ... external power supply required ,Low power consumption, suitable for desktop and notebook MDTC-6001 Combo card readers and usb hub all in one