Key Benefits • Reads from and writes to all SD, MMC, and xD-Picture Card memory cards • Compatible with MacBook Pro and Windows notebooks with ExpressCard slot • Fast file transfers between memory card and computer without cables • Adapter inserts completely into slot with no protrusion—may be left in all the time • Plug and play—no drivers to install Easy Access to All Your Gadgets' Data Sonnet’s Multimedia Memory Card Reader & Writer ExpressCard/34 is a Simply Fast™ solution for moving files between your electronic devices’ memory cards and your notebook computer’s hard drive, with no cables required. This handy device works with the most popular memory card formats, including SD (Secure Digital), MMC (Multimedia Card), XD-Picture Card™, and all their variations—wide compatibility enables you to work with memory cards used in devices such as digital cameras, cell phones, MP3 players, digital picture frames, and more! Mac & PC Compatibility For complete Mac and PC compatibility list, visit product's webpage.