Features: This product supports NVMe M.2 NGFF interfaces to SFF-8611 interfaces, and is compatible SFF-8611 to SFF-8639 cable to connect to hard drives. However, the cable needs to be purchased separately by the buyer. Before purchasing, please note that if you want to unplug the SFF-8611 interfaces cable after inserting it into the adapter card SFF-8611 interfaces, be sure to press the reverse switching at the cable interfaces to unplug it. If the cable is forcefully pulled out, it will damage the adapter card! The SFF-8611 interfaces is only the interfaces shape, and the data protocol of the interfaces is determined by your mainboard. Common types includeSAS, SATA, and NVMe The SFF-8611 interfaces of this adapter card is based on the NVMe protocol. This product needs to be plugged into an interfaces that supports PCIeX4 NVMe M.2 NGFF SSD on your computer in order to use it.The M.2 interfaces of PCIeX2 and SATA protocol cannot be used! Specifications: Size：approx 8x2.2cm/3.15x0.87in Item: M.2 NVMe to SFF8611 Adapter Card The SFF-8611 Port Protocol：NVMe Package Includes: 1PC M.2 NVMe to SFF8611 Adapter Card note: Due to the problems of lighting effects and shootingangles, there will be certain tolerances in the product, please understand. Please allow 0-1cm dimension difference due to different manual measurement.