Smart Buy SDHC Class 4 Flash Memory Card SD HC Secure Digital C4 Fast Speed for Camera (16GB (4-Pack)) Brand New SDHC Class 4 Flash Memory Card Built-in Error Correcting Code (ECC) to detect and correct transfer errors. Supports Content Protection for Recordable Media (CPRM). Allows In System Programming (ISP) for updating firmware. Support auto-standby, power-off and sleep modes. Mechanical write-protection switch. Waterproof, Temperature Proof, X-Ray proof. Support FAT32 (SDHC) file system. Packaging: Retail Box Package. Warranty: 2 Years (Undercover by Smartbuy-Depot)