Pretec SDHC - Class 6 SD High Capacity (SDHC ™) is the new SD ™ memory card based on the SDA specification version 2.00. The new SDA 2.00 specification provides higher capacity SD cards - 4 GB SDHC works differently than standard SD cards, it is not backward compatible with devices that support legacy SD format.
Technical specifications Capacity: 4GB Guaranteed write speed: 6MB/s (Class 6) Supply voltage: 2.7 to 3.6 V Dimensions: 24 x 32 x 2.1 mm Weight: 2g Warranty: Lifetime