Product name: PCIE3.1X8 to dual M.2 hard disk expansion card Support interface: 2 x M.2 (NVME) interface Motherboard interface: PCIE 3.1X4 Color:black Material:plastic Size:180 x 55MM Package Contents: 1 x Expansion 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. Two M.2 ports support NVME protocol, support 5 kinds of hard disks, and make the hard disk transfer at . has a strong heat dissipation capacity, so that the hard disk can work for a long time without affecting the speed due to heat. 2G hard drive speed, the computer is no longer stuck. PCI Express 3.1 architecture, the actual writing and reading speed is close to 2GB/S. The ASM1812 chip has strong compatibility.