1,3 ports USB HUB Card reader 2,Support MS/Pro Duo,M2,SD/MMC,Micro ... SD 3,USB 2.0 interface card reader USB 2.0 Card readerHigh Speed USB2.0, Compliance with USB 1 ... .16 card slot:1 slot: CF I/CF 22. slot :SDHC/SD ... and play ,high speed data tranferUSB bus power Supply ,No external power supply requiredSupport high speed card, Slim size ,easy for carryTransfer ...