Description:1.SD Card 2.Plug and play (no software needed)3. SD Card format,High-speed read and write4.4GB,8GB,16GB,32GB,64GB Storage Size5.Suitable for camera, not for mobile phone 6.Operating Temperature -13ordm F to 185ordm F (-25ordm C to 85 ordm C)7.Storage Temperature -40ordm F to 185ordm F (-40ordm C to 85ordm C)Warm Tips ( 2.0USB reader Test Result) :4GB-Class 6-SDHC8GB/16GB/32GB-Class 10-SDHC64GB-Class 10-SDXCClass 6: Read speed around 15-20MB/S ,Write speed around 6-8MB/SClass10: Read speed around 15-30MB/S ,Write speed around 9-12MB/SThe SD card speed is based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.SD card speed is greatly affected by card reader, adapter, USB port etc. Low quality device will 100% slow down card speed.Hardware Features:Original high quality flash memoryManufactured in TaiwanAssembled in ChinaAbout capacity:· 128MB=approximately 110MB-120MB · 4GB=approximately 3.6GB-3.8GB · 8GB=approximately 7.2GB-7.6GB · 16GB=approximately 14GB-15GB · 32GB=approximately 28GB-30GB · 64GB=approximately 58GB-60GB · 128GB=approximately 110GB-120GB · 256GB=approximately 228GB-236GB · 512GB=approximately 440GB-460GB This is calculation difference between manufacturer and our PC,just for you reference.Package included:1 X SD Card 1 X box