Kingston Technology SDV/4GB SDHC Video Card (Blue) High-Speed Class Rating - Class 4: 4 MB/sec. minimum data transfer rate Secure - built-in write-protect switch prevents accidental data loss Storage - Writable labels for easy archiving. Compliant - with the SD Card Association card 2.00 specification Compatible - with SDHC host devices; not compatible with standard SD-enabled devices/readers