Specification: 1.Hight speed read and write 2. we have Capacity: 128MB/1GB/2GB /4GB /8GB/16GB/32GB/64GB/128GB 3.Suitable for:MP3/MP4 Player,mobile phones, Cameras and more 4.Please notice: 128mb-4GB(Class 6), 8GB(Class 6), 16GB(Class 6), 32G(Class 10) 64G(Class 10),128GB(class 10) Micro SD Card, For Valued Customers: 1. Why the micro sd card real capacity is not correct capacity? Flash memory vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated, but the operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB. so there are some differences between display capacity and nominal capacity of flash memory products.However, this is allowed to exist. Please do not doubt his authenticity. About capacity: 4GB = approximately 3.6GB-3.8GB 8GB = approximately 7.4GB-7.6GB 16GB = approximately 14GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB 128GB= approximately 119GB-120GB This is calculation difference between manufacturer and our PC, please Google 'Memory card capacity' to get more information Package included: 1XMicro SD Card 1XSD Adapter 1XCard reader