High Resolution, 4K Video Recording with SDXC UHS-II V90 Memory Card Support the latest DSLR and mirrorless camera technology with our advanced AV PRO SD MK2 V90 (SDXC UHS-II) card. Capture full frame 4K resolution video, as well as sequential burst photography in RAW or JPEG formats with fast sustained write performance of 260 MB/s. Built to perform at temperatures ranging from -25° C to 85° C (-13°F to 185°F), allowing for operation in extreme environments such as deserts, high elevations, or arctic conditions.