The UHS-1 spec is characterized by a significant performance boost defined by the SD Association as possessing "bus-interface speeds up to 312 Megabytes per second for greater device performance in SDXC and SDHC host products." So far, the new interface has proven to have a substantial impact in applications where streaming full HD & 3D video and rapid fire JPEG & RAW still photography is imperative. This means it is quickly being adopted by burst mode nature, wedding, and even portrait shooters concerned with never missing a shot. Additional Elite 633 features include advanced Error Correction Code (ECC), reliable Wear Leveling, and storage integrity in harsh environments (including static, vibration, shock & UV light exposure). The Elite633 memory card also provides seamless integration into any SDHC, SDXC or Class 2, 4, 6 & 10 host device and is backed by Delkin's trusted lifetime warranty. Delkin Devices is fully committed to customer satisfaction, and our memory cards are put through several rigorous quality tests before being released. Any potential difficulties or inquiries regarding your purchase will be dealt with by our US-based customer support system. A team of technicians will gladly recover deleted images completely free of charge and even retrieve files from re-formatted or corrupted cards whenever possible.