Input interface: PCI-E X16 Output interface: 4*NVME M.2 (M-Key) Supported devices: M.2 NVMe SSD hard disk Supported systems: WIN7, 8, 10, 11, Linux, This product is suitable for motherboard computers that support PCI-E signal splitting,and can run 4 NVMe hard disks at the same time (the motherboard without signal splitting can only run the disk with SSD1 interface);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 disk,high-speed expansion transmission,so that the computer can give full play to its performance and improve the running speed; PCI-E X16 gold finger is gold-plated to prevent oxidation,improve contact and conduction performance and increase service life; Precautions: How to identify whether the computer motherboard has PCI-E signal splitting 1. Currently on the market,various of motherboards such as ,for ,,etc. 2. (If the motherboard supports PCI-E splitting,you can usually find related options in the BIOS settings for configuration. These options may be located in the "Advanced" or "Advanced Settings" section,and the specific location depending on the motherboard model and BIOS version. In the BIOS interface,you can find options related to PCI-E splitting. These options may include selecting the split slot,splitting mode (such as x16 split into x8+x8 / x8+x4+x4 / x4+x4+x4+x4),etc. By adjusting these options,you can achieve the splitting of PCIe channels to meet the needs of specific hardware). Colour:Black Material:ABS Due to different batches,there may be differences in product appearance and printed text,which not affect use Package Contents: 1 * computer expansion card 4 * 1.0MM silicone gasket 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.