This product supports nvme m.2 ngff interface to oculink sff-8611 interface, and supports oculink sff-8611 to sff-8639 wire to U.2 hard disk, but the wire needs to be purchased by the buyer separately. Key points before purchase: 1. Please note that if you want to pull out the oculink sff-8611 interface wire after it is inserted into the sff-8611 interface of the adapter card, you must the reverse button at the wire interface to pull it out! If the wire is pulled out by force, the adapter card be damaged! Please pay attention. 2. The sff-8611 interface is only an interface shape. The data protocol of the interface is determined by your motherboard. There are three common types: SAS, and nvme. The sff-8611 interface of this adapter card is nvme protocol. 3. This product needs to be plugged into the interface of your computer that supports PCIe X4 nvme m.2 ngff SSD to use! M.2 interface of PCIe x2 and protocol cannot be used! Color: Green Material: PCB Package Contents: 1 * Nvme M.2 Ngff Interface To Oculink Sff-8611 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.