The lexar pro usb 30 dual slot reader is a professional level portable usb reader that provides maximum high speed file transfer with a usb interface speed up to 500mbs allowing you to get the best out of the latest high performance memory cards its also backwards compatible with all standard cf sd and sdhc cards as well as usb 20 devices the lexar professional usb 30 dual slot reader delivers blazing fast transfer speeds from card to computer with a usb interface speed that reads