Shipping is free to Amazon Prime members or on orders over $35. About this item: - Card Offload Speed: Up to 200MB/s read speeds with SanDisk QuickFlow Technology. - QuickFlow Technology Availability: Exclusive to 64GB, 128GB, 256GB, 512GB, and 1TB capacities. - PRO-READER Compatibility: Achieve maximum speeds when paired with SanDisk Professional PRO-READER SD and microSD (sold separately). - Shot Speeds: Write speed up to 140MB/s for sequential burst mode photography. - Video Support: Optimized for shooting 4K UHD video; support may vary based on host device and file attributes. - UHS Speed Class 3 (U3) and V30: Designed to support 4K UHD video recording with sustained video capture rate of 30MB/s for real-time video recording.