4.4GB,8GB,16GB,32GB,64GB, 128GBStorage Size 5.Applies to Cell Phones, Cameras, MP3/MP4 Player and Moredevice 6.Can be Used as Micro SD or SD Card 7.Operating Temperature -13º Fto 185º F (-25º C to 85 º C) 8.Storage Temperature -40º F to 185º F (-40º C to 85º C) Warm Tips (2.0USB reader Test Result):4GB-Class 6-SDHC 8GB/ 16GB/32GB-Class 10-SDHC 64GB/128GB-Class 10-SDXC Class 6: Read speed around 15-2OMB/ S,Write speed around 6-8MB/S Class10: Read speed around 15-30MB/S,Write speed around 9-12MB/ S The Micro SD card speed is based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. Micro SD card speed is greatly affected by card reader, adapter, USB port etc. Low quality device will 100% slow down card speed. HardwareFeatures: Originalhighqualityflashmemory ManufacturedinTaiwan AssembledinChina About capacity: 4GB=approximately 3.6GB-3.8GB 8GB=approximately 7.2GB-7.6G 16GB=approximately 14.4GB-14.8GB 32GB=approximately 28.5GB-30GB 64GB=approximately 58GB-60GB 128GB=approximately 113GB-124GB This is calculation difference between manufacturer and our PC,just for you reference. Package included: 1X Micro sd card 1X Retail package