PCI Express 3.1 architecture, the actual writing and reading speed is close to 2GB/S. Two M.2 ports support NVME protocol, support 5 kinds of hard disks, and make the hard disk fer at full speed. 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.The ASM1812 chip has strong compatibility. Durable and Reliable: Built with high-quality materials, this adapter ensures durability and reliability for long-term use, enhancing your system's performance without frequent replacements. Specifications Supported Interfaces: Two M.2 (NVME) interfaces Motherboard Interface: PCIE 3.1X4 Colour:Black Material:PCB Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 1 * 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.