... and high speed Specification of mirco sd memory card: SpecificationsCapacity128MB,256MB,512MB,1GB,2GB,4GB,8GB,16GB ... to 60°C)Storage Temperature4°F to 185°F (-20°C to 85°C) Operating voltage 2.7v~3.6v Rate Read ... a certain room, so it will lead to deviation.2.How much is the actual usable capacity can be ... items should be checked one by one before sending out.Regard to the memory card,If you get any bad ...