This multi-slot universal card reader offers a faster, easier way to transfer files, images & music between memory cards & computer. It’s plug-&-play design is compatible with the following memory card formats: CF type I & II, CF UDMA, SD, SDHC, SDXC, micro SD, Memory Stick (Micro & XC), Memory Stick PRO (HG), Memory Stick PRO DUO (HG), Memory Stick DUO, Microdrive, MMC, MMC Plus, x D & more. Simply insert your memory card into one of the five slots in the reader & it appears on your computer as a new drive. USB (Universal Serial Bus) 3.0 enables transfer speeds up to 5 Gbps with no external power source requirement. The Reader is also fully backwards compatible with USB (Universal Serial Bus) 2.0 & USB (Universal Serial Bus) 1.1. Using the Calumet USB (Universal Serial Bus) 3.0 Universal Card Reader will extend the battery life of your digital camera for taking pictures, not downloading them.