The Promaster CFexpress Type B 325GB Velocity CINE is the perfect memory card for recording high-resolution, high-throughput media. Whether you're shooting stills at a high frame rate, or 4K video, the card's read speed of up to 1,000 MB/s and write speed of up to 950 MB/s will deliver professional results. The capacity of 325GB means that you can shoot hours of still photos or video without having to offload your media. The card comes with built-in error correct, ensuring your media is captured correctly every time.