Class 2:Support the normal movie of MPEG4 and ordinary digital camera filming
Class 4:Can fluent play the high definition video and support digital camera burst shot
Class 6:Support SLR cameras burst shot and other requirement of professional device 
Class 10:Class 10 transcend the requirements of high definition video recording

Capacity:4GB/8GB/16GB/32GB/64GB
Size:24MMx32MMx2.1MM
Speed:Class 4,lowest write speed 4MB/S
Storage temperature:-40℃~85℃
Working temperature:-25℃~85℃
Voltage:3.3V