The new memory card conforms to the SD memory card ver.2.00 standard introduced by the SD Card Association (SDA) which enables capacities greater than 2-gigabytes to be achieved and features minimum SD Speed Class Ratings to achieve optimal performance for FAT32-enabled hosts. The SD Speed Class Ratings specify a minimum sustained write speed for SDHC cards (Class 2: 2 MB/s2; Class 4: 4 MB/s; Class 6: 6 MB/s). SPECIFICATIONS: 4GB memory size Class 4 Dimension: 32mm L x 24mm W x 2.1mm H 2.7-3.6V Security Function Available Non-volatile Solid-State Storage