This ProMaster Advanced CFexpress Type B memory card offers excellent performance at an affordable price.
With excellent minimum sustained sequentual write speeds, Advanced Memory Cards enable your camera to perform well in all modes including high-resolution video capture. ProMaster CFX-B cards use top quality flash memory and components for years of service and thousands of read/write cycles.
800 MB/s minimum sustained sequential write speed. 1TB version is 1300 mb/s
1700 MB/s read speed
PCI Express 4.0 Bus (also supports NVM Express)
Heat & cold resistant
Limited lifetime warranty