This is a CFexpress Type A high-speed card reader. The upstream interface is Type-C. It supports USB3.1 GEN2 interface and is backward compatible to realize high-speed data transmission with the computer. It can transmit high-quality videos, such as 4K/8K, to data storage devices faster than ever. Support USB super speed / high speed / full speed operation, plug and play, no need to set up, support hot plug. Import the videos/files/photos in the CFexpress Type A memory card to the computer, and the transfer is stable, simple and fast. Compatible system: System above Microsoft Windows XP MAC OS 10.6.2 and above Linux Fedora FC8 or higher system Features: PCIe GEN3*1 TOUSB3.1 GEN 2 (10Gbps) Plug and play, no driver required Exquisite and compact appearance NTFS/EXT4/FAT32/EXFAT and other disk formats Main control chip: ASM2362 Colour:Dark gray Material:aluminum Size:68x48x9mm Package Contents: 2 * CFexpress Type A high-speed card reader Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.