Delkin's CompactFlash Pro UDMA enabled cards deliver industry-leading read/write speeds with a sustained transfer speed up to 450X (66MB/sec). The enhanced camera-to-card and card-to-computer transfer times considerably improve workflow for any pro photographer in the field. The difference may be crucial for those working with battery operated laptops, and particularly important for pros working in news media, wedding or event photography. Delkin CompactFlash is UDMA 6 enabled with transfer speeds up to 66MB/s -450X. All Delkin memory cards are guaranteed to work with its respective CompactFlash host. All Delkin memory cards come with an industry leading lifetime warranty and US based customer support.