About capacity display in computer :

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. This is calculation difference between manufacturer and our PC; please Google 'Memory card capacity' to get more information.The pursuit of the perfect person is not recommended to buy.

About writing and reading speed :

16 - 32gb class 10 SDHC;

64gb 128gb class 10 SDXC

Package list:

Withretail package, without usb card reader

1x memory card

1 x SD adapter

1x retail package

Dear buyers , this is the link to track the package:

1.【https://www.17track.net/en#nums=  (Please enter your tracking number)】