SDHC Class10 compliant, read speed is up to 40 MB/s (16GB/32GB) Supports Content Protection for Recordable Media (CPRM) Security level complies with Secure Digital Music Initiative (SDMI) Compliant with RoHS requirement Built-in Error Correcting Code (ECC) to detect and correct transfer errors Free-download SP Widget software provides powerful functions such as data backup & restore, AES 256-bit encryption, and cloud storage for efficient data management. Transfer rates may vary, depending on system platform / software / interface and microSD card capacity .