Read speed and write speed :
● 633X 32GB-Class 10, UHS-I (U1), 633x (Max up to 100MB/s read, 20MB/s write)
● 633X 64GB Class 10, UHS-I (U3), 633x (Max up to 100MB/s read, 45MB/s write)
● 633X 128GB Class 10, UHS-I (U3), 633x (Max up to 100MB/s read, 45MB/s write)
● 633X 256GB Class 10, UHS-I (U3), 633x (Max up to 100MB/s read, 45MB/s write)
● 633X 512GB Class 10, UHS-I (U3), 633x (Max up to 100MB/s read, 70MB/s write)

product description :
● 10 year warranty.
● Original micro SD card for smartphone, dash cam, camera, drone, tablet or action camera.
● Quickly captures, plays back, and transfers media files, including 1080p full-HD, 3D, and 4K video.
● The memory card is rated Class 10 and utilizes UHS-I technology to achieve transfer speeds of up to 633x (100MB/s)2, giving you the speed and capacity you need to shoot, transfer and share more adventures on the go.

About application performance level :
● 32GB ,64GB,128GB,256GB is A1,512GB is A2.
● 32GB is V10,64GB,128GB,256GB,512GB is V30.
● 32GB is U1,64GB,128GB,256GB,512GB is U3.
● 32GB is SDHC,64GB,128GB,256GB,512GB is SDXC.

Please note :
Lexar Micro SD 633X has new version and old version,they are all 100% original,read speed and write speed are same,we will send randomly.

Capture more of your favorite content :
Designed for action cams, tablets or smartphones, Lexar High-Performance 633x microSDHC/microSDXC UHS-I memory cards make it easy to quickly capture, play and transfer 1080P Full HD, 3D and 4K video1, as well as the highest quality movies , photos and songs. These Class 10 memory cards utilize UHS-I technology to provide high-speed performance.

Multiple ways to use :
These memory cards are also great for tablets or smartphones, making it easy to quickly download or save all your favorite media files, including movies, photos and songs in the highest quality.

After strict inspection:
All Lexar products are produced by quasi-intelligent manufacturing, highly automated and information-based equipment, and undergo extensive testing by professional equipment in Lexar’s quality laboratories.