The high performance lexar professional usb 30 dual slot reader features the new superspeed usb 30 interface which operates at 500mb per second a huge improvement on the usb 20 interface which operates at 60mb per secondrrthe lexar professional udma dual slot usb 30 reader is a high performance card reader and ideal for use with high speed cards providing incredibly fast download speeds when paired with a udma cf card sdxc card or uhs i compliant sdhc card therefore you can maximise