"Pair the SanDisk Extreme PRO UHS-I SD card with the SanDisk Professional PRO-READER SD and microSD to achieve maximum speeds Save time with card offload speeds of up to 200MB/s (Up to 200MB/s read speeds, engineered with proprietary technology to reach speeds beyond UHS-I 104MB/s, require compatible devices capable of reaching such speeds. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. X = 150KB/sec.) Powered by SanDisk QuickFlow Technology (SanDisk QuickFlow Technology is only available for 64GB, 128GB, 256GB, 400GB, 512GB, and 1TB capacities. 1GB=1,000,000,000 bytes and 1TB=1,000,000,000,000 bytes. Actual user storage less.) Shot speeds up to 140MB/s (Write speed up to 140MB/s. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. X = 150KB/sec.) Premium aluminum reader enclosure helps keep card cool to maintain fast transfer speeds USB-C (5Gbps) port on card reader enables super-fast data transfer Date First Available: June 9, 2022 Compatible Devices: Camera Model Name: Extreme PRO SDXC UHS-I Memory Card Secure Digital Association Speed Class: Class 10 Color: Black Item model number: 901a572b-adba-4b02-be80-99414117abbb ASIN: B0B3PN632Y Model Number: 901a572b-adba-4b02-be80-99414117abbb Flash Memory Type: Micro SD, SD, SDXC Brand: SanDisk Memory Storage Capacity: 256 GB Series: Extreme PRO SDXC UHS-I Memory Card Color : Black Warranty Type: Limited Read Speed: 200 Megabytes Per Second Hardware Interface: USB Manufacturer: SanDisk Additional Features: Lightweight Write Speed: 140 Megabytes Per Second Media Speed: 140 Megabytes Per Second Hardware Connectivity: USB Special Feature: Lightweight"