1. This product supports installing one U.2/U.3 SFF-8639 hard drive in the machine's PCIe NVMe M.2 NGFF SSD interface. However, the buyer must purchase an SSF-8611 to SFF-8639 cable separately. 2. It includes for a chip and supports PCIe 3.0/4.0/5.0, without any restrictions on hard drive performance. 3. It supports installation in the NVMe M.2 2280 hard drive interface, but not in the M.2 interface. 4. This product supports PCIe 5.0, 4.0, and 3.0 protocols. If your machine's M.2 interface supports PCIe 4.0, your hard drive is a 4.0 hard drive, and your data cable supports 4.0 (some data cables are designed with shoddy design and lack shielding for signal lines), you can run at PCIe 4.0 speeds. Please note that if any of the three links above do not support 4.0, the hard drive not run at 4.0 speeds. Note: 1. Make sure your motherboard has a PCIe NVMe M.2 NGFF SSD slot. It does not support M.2 NGFF SSD slots. Please contact your motherboard's official customer service for details. If it does not support it, please do not purchase! 2. Connecting or SAS hard drives using an SFF-8611 to 4 (or SAS) cable is not supported. 3. Only connecting U.2/U.3 SFF-8639 SSDs using an SSF-8611 to SFF-8639 cable is supported. 4. U.2 SFF-8639 SSDs do not use a SAS interface. Some SFF-8639 hard drives (such as 's PM1735) are designed for single U.3 operation and cannot be used. 5. When connecting an external graphics card dock, make sure the graphics card and the dock are compatible, and pay attention to the cable orientation. Color: Green Material: plastic Package Contents: 1 * Riser Adapter 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.