Experience blazing-fast transfer speed with the ProMaster Velocity CINE USB 3.2 Dual Card Reader - CFexpress Type B and SD. It is perfect for users with cameras with dual memory slots that allow both CFexpress Type B and SD cards. CFexpress Type B card slot achieves transfer speeds up to 10 Gbps. UHS-II SD card slot is backward compatible with UHS-I and reaches transfer speeds up to 5 Gbps. External aluminium housing helps prevent heat build-up, which can damage CFexpress cards. Each reader includes a USB-A and USB-C cord, either of which attaches to the back of the reader using its built-in USB-C 3.2 port.