Kingston Technology's Secure Digital High Capacity (SDHC) memory cards are fully compliant with the latest SD Association specification. They are a performance class of SD memory cards designed to meet the storage demands of high-quality digital still and video cameras and other personal electronic devices. Starting at 4GB, SDHC cards offer larger-volume data storage and optimized recording performance with support for FAT 32 file formats. In addition, Kingston's SDHC card use speed "class" ratings known as Class 10 that delivers a minimum data transfer rate (see specs) for optimum performance with SDHC devices. Although identical in size to standard SD cards, the SDHC cards are designed differently and are only recognized by SDHC & SDXC host devices. To ensure compatibility, look for the SDHC logo on cards and host devices (cameras, camcorders, etc.). For added reliability and durability, our solid state SDHC memory cards are built of nonvolatile memory components and have no moving parts that could wear out or break. All cards are 100-percent tested and are backed by a lifetime warranty and free live technical support.