The Hikvision HS-TF-H1I Series MicroSD Cards for Surveillance are specially designed for video surveillance recording with a Class 10 read/write speed. They adopt MLC NAND, fully satisfying the requirements of high read-write speed, stability, and durability for video surveillance; service life can be increased to about 10 times longer than that of common microSD cards that adopt TLC storage NAND in the same operating environment.The S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) feature provides unique functions such as 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. A read-write lock when used with Hikvision cameras prevents unauthorized personnel from reading from, or writing to, the microSD card even if they gain possession. A special Hikvision storage algorithm offers longer service life if used with Hikvision cameras. The devices are also water-, shock-, X-ray-, and temperature-resistant to perform normally in various harsh environments.