The Western Digital SDSQXBU-064G-AN6MA is a 64GB SanDisk Extreme Plus microSDXC memory card with Class 10, UHS-I, U3, and V30 ratings. It offers read speeds of up to 200MB/s and write speeds of up to 90MB/s, supporting 4K UHD video and rapid burst photography. This card is built for demanding environments, being temperature-proof, waterproof, shock-proof, and x-ray proof for data integrity.