GZSHUNLI Color: black material: plastic To install U2X4 PCIe 4.0 X4 U.2 adapter card and U.2 storage devices, follow these steps: Power off: Before installing any hardware, make sure to turn off the power supply of the computer and unplug the power plug. This is to the safety during installation. Insert adapter card: Insert U2X4 PCIe 4.0 X4 U.2 adapter card into the PCI Express slot on the computer motherboard. The slot is usually located on the motherboard, make sure that the slot is correctly aligned and press the card gently to firmly inserted into the slot. Check and identify: Enter the of the computer and check whether the system can correctly identify and display the connected U.2 storage device. You can use the disk management tool of the to view the new storage device. Package Contents: 1 x PCIE Adapter 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.