... one card reader 1, 4 slots:SD,M2,MS,TF slots. 2,USB 2.0/1.0 Item NO:MDTC-B008 portable usb 2.0 all in one card reader ... Supports:USB2.0 and 1.1,the ... -powered, No external power supply required ,Low power consumption, suitable for desktop and notebook MDTC-B008 portable USB 2.0 all in one card reader ...