The Secure Digital High Capacity (SDHC) Card Type
Although apparently identical to standard SD cards, SDHC cards are designed differently and are only recognized by SDHC host devices. To ensure compatibility, look for the SDHC logo on cards and host devices.
Kingston's Class Rating System
Kingston's SDHC cards use the Kingston "Class" speed ratings. These ratings include Class 2, which provides a minimum data transfer rate of 2MB/second, Class 4, which provides a minimum data transfer rate of 4MB/second, and Class 6, which provides a minimum data transfer rate of 6MB/second.
