4GB Genuine Kingston SDHC SD card, meanwhile Class 6, Class 4 and Class 2 will be shipped randomly. With 4GB capacity, SDHC cards offer larger-volume data storage and optimized recording performance with support for FAT 32 file formats. Designed differently and are only recognized by SDHC host devices. Built of nonvolatile memory components and have no moving parts that could wear out or break. Capacity — 4GB, Dimensions — 0.94" x 1.26" x 0.08" (24mm X 32mm X 2.1mm) High-Speed Class Rating: Class 6: 6 MB/sec minimum data transfer rate Operating Temperature — -13o F to 185o F (-25o C to 85 o C) Storage Temperature — -40o F to 185o F (-40o C to 85o C) Voltage — 3.3V Compliant — with the SD Card Association card 2.00 specification Secure — built-in write-protect switch prevents accidental data loss Compatible — with SDHC host devices; not compatible with standard SD-enabled devices/readers File Format — FAT 32