What are UHS interface and UHS Speed Class? Category : Specification / Capacity / Performance UHS (Ultra High Speed), the fastest performance category available today, defines bus-interface speeds of up to 312 Megabytes per second. It is exclusively designed for SDHC and SDXC memory cards, and compatible with SDHC and SDXC devices. Is the answer helpful? Related How much content can you store in a card ? What is the difference between FAT32 and exFAT? Which format should I format my memory card to? SD / uSD Card Waterproof Standard Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started