Features and Functions: MLC NAND with High Durability Adopt MLC storage NAND with higher durability; and the service life can be increased to about 10 times longer than that of common Micro SD (TF) cards which adopt TLC storage NAND in the same operating environment; S.M.A.R.T. Mechanism Unique functions of life forewarning and health monitoring when used with Hikvision cameras. It can calculate the remaining available time based on the past records of use frequency and the number of bad blocks, and realize real-time warning to secure user data to the largest extent; Unique Security Mechanism Unique function of read-write lock when used with Hikvision cameras, preventing irrelevant personnel from reading or writing even if they get the Micro SD (TF) card; Special Storage Algorithm Embedded with special storage algorithm of Hikvision; and longer service life if used with Hikvision cameras; Ultra-Strong Adaptability Waterproof, shock proof, X-ray proof, and temperature proof to perform normally in various harsh environments.