Features: Suitable for motherboard computers that support PCIe signal splitting and can run up to 4 NVMe hard drive simultaneously (not splittable motherboard can only run SSD1 port disks). Supports 4-port M.2 NVME protocol. PCIe 4.0 X16 is backward compatibility with PCIe 3.0. It can improve the read and write performances of the hard drive, expand and transfer at fast speed, and enhances the running speed. Quality, prevent oxidation, improves contact and conductivity, and extends service life. Specifications: Material: Printed Circuit Board Size: approx. 12x8cm/4.72x3.15inch Product Name: PCIe 4.0 X16 1/4 NVME Expansion Card Input: PCIe X16 Output: 4xNVME M.2 (M-Key) Supported devices: M.2 NVMe SSDs hard drive Supported systems: WIN 7, 8, 10, 11 and more Package Includes: 1Pc PCIe 4.0 X16 to NVME Adapter Card note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.