MicroSD (transflash) also known as microSD， about 1 / 4 of the SD card， is currently the smallest designed for mobile phones， small camera equipment， GPS navigation and design of removable memory card.TF card has all the advantages of traditional SD card， collocation SD adapter can be converted into SD card， and is compatible with SD card using the equipment， in line with the SD Association specifications.Working voltage: 2.7 ~ 3.6VWorking temperature: 0 ~ 55 degreesStorage temperature: -20 ~ 65 degreesKeep humidity: 30 ~ 80%RH (not dew)The physical operation speed of R:16.3MB/s W:4.7MB/sCreate a file speed of 2.26 ms/fileDelete the file speed 1.95 ms/file4K R:3.7MB/s W:2.0MB/s random read and write speed512K R:16.5MB/s W:4.9MB/s random read and write speed4K file copy speed of R:0.7MB/s W:0.1MB/s32MB file copy speed of R:14.3MB/s W:4.8MB/s* read， write speed depends on the use of equipment and document size.Capacity: 64GB: 128GB:32GBColor: Green