M.2 NVMe to PCIe 4.0 X4 Adapter: It allows you to install an M.2 NVMe SSD into the M.2 Key M slot by converting one PCIe X4/X8/X16 slot on the motherboard. It is FCC and CE certified, ensuring highly reliable and stable PCIe X4 full speed. Your M.2 NVMe SSD speed remains unaffected, just as if it was installed on the motherboard. With to the capacity of the M.2 NVMe SSD, you can enjoy up to 2T/4T storage, support 22110/2280/2260/2242/2230 PCIe (NVMe/AHCI) 4.0/3.0 M.2 SSD (Note: Not support M.2 SATA SSD) To reach PCIe 4.0 X4 (64Gbps) full speed, the CPU and motherboard PCIe slot and PCIe M.2 SSD should all be PCIe 4.0 features (Note: PCIe 4.0 is not supported on CPUs below 11th generation) Experience seamless OS booting by reinstalling your OS and setting up BIOS/UEFI boot from this M.2 NVMe SSD. (Note: Some motherboards are too old to support OS booting. In this case, M.2 NVMe SSDs can be used as storage disks) Note: Factory batch different, such as slight differences in lettering, does not affect the use of Colour:Black Material:Plastic+Metal Package Contents: 1x NVMe to PCIe Adapter Card 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.