Features Blazing-Fast Speeds That Deliver Raw 4K Video When you're shooting where the action is, the CFexpress Card Type B unleashes the RAW performance of your gear. With read speeds up to 1700MB/s and write speeds up to 1400MB/s, you'll get low latency during high-speed recording and an enhanced workflow efficiency that's far beyond anything existing SanDisk cards deliver. This card enables smooth, RAW 4K video capture with sustainable performance. Backward-compatible with select XQD cameras that adopt firmware enabling CFexpress. Specifications Capacity: 256 GB Compatibility: Backwards-compatible with select current XQD host devices Dimensions (L x W x H): 1.52" x 1.17" x 0.15" Sequential Read Performance: Up to 1700MB/s Sequential Write Performance: Up to 1200MB/s Package Content 1x SanDisk 256GB Extreme PRO CFexpress Card Type B - SDCFE-256G-GN4NN READ 1700 MB/S WRITE 1200MB/S