1,usb 3.0 card reader 2.Support :TF / Micro SD,WINDOWS 98 /ME/2000/XP/Vista//Mac QS 3,USB2.0version 4.OEM welcome Charming multifunctional USB 3.0 Card reader for SD, MS, M2, TF, XD with 6 slotUSB 2.0 Card readerHigh Speed USB2.0, Compliance with USB 1.1support TF / Micro SD,WINDOWS 98 /ME/2000/XP/Vista//Mac QSPlug and play ,high speed data tranferUSB bus power Supply ,No external power supply ...