The USB 3.0 Dual Slot SD UHS-II and CF Memory Card Reader from Delkin Devices can transfer data from Compact Flash and SD cards at the same time to your computer via USB 3.0. The USB 3.0 interface can download data at speeds up to 500 MB/s that is ten times faster than USB 2.0. If your computer doesn't support USB 3.0, this card reader is backward compatible with USB 2.0 and 1.1 but will transfer data at a slower rate. Delkin has designed the SD slot with the second row of connectors to improve speed and performance, while also allowing for backward compatibility with non-UHS-II cards. The other slot reads Compact Flash cards, which supports UDMA 7 and VPG. The Delkin memory card reader is plug-and-play compatible and provides a fast way to read and save videos, images, and more, to SD and CF cards.