Designed for mirrorless and DSLR cameras, the 64GB Professional 1066x UHSI SDXC Memory Card from Lexar lets you quickly capture and transfer highquality photos, including Full HD and UHD 4K video with read speeds of up to 160 MB/s and write speeds of up to 70 MB/s. All of this allows you to dramatically accelerate your workflow. To help increase durability, Lexar made this card resistant to water, shock, vibration, xrays, and temperature extremes. Specifications. Storage Capacity 32GB. Speed 633. Speed Class 10. Bus Type UHSI. Weight 0.07 lbs