This product is suitable for motherboard computers that support PCI-E signal diversion, and can run 4 NVMe hard drives at the same time (without signal diversion, the motherboard can only run SSD1 interface disks) Support 4-port M.2 NVME protocol, PCI-E4.0 X16 is backward compatible with PCI-E3.0 The PCI-E X16 interface can improve the read and write performance of the hard drive, achieve high-speed expansion and transmission, and enable the computer to give full play to its performance, thereby increasing the operating speed High-speed transmission: M.2 NVME to PCIe 4.0 adapter ensures high-speed data transmission, thereby improving the overall performance of the PC Additional functions: As an add-on card, it provides convenience and flexibility, allowing you to expand the storage capacity of the PC, easy to install Product name: PCI-E4.0 X16 1 to 4 NVME expansion card Input interface: PCI-E X16 Output interface: 4*NVME M.2 (M-Key) Supported devices: M.2 NVMe SSD hard disk Supported systems: for WIN7, 8, 10, 11, Linux, Colour:black Material:PCB Due to different product batches, the appearance , which does not affect the use Package Contents: 1 * Expansion Card kit 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.