The Delkin USB 3.0 SD UHS-II and CF Reader allows simultaneous file transfer from SD and CompactFlash card. Although it is meant for the USB 3.0 devices, the card reader can be used with USB 2.0 and USB 1.1 compliant devices as well. The card reader downloads data at a fast speed of 500 Mbps. The dedicated SD card slot allows you to use non-UHS-II cards. As for the CF slot supports UDMA 7 and VPG CompactFlash cards. The plug-and-play operation of the reader speeds up the overall performance. You can seal the lid over the card slots to prevent dust and moisture from entering inside.