Feature:1. Wide Compatibility: This PCIe 4x to u.2 SFF8639 expansion card is compatible with ordinary SATA hard disk.2. For 2.5in SSD: This PCIe 4x to u.2 SFF8639 expansion card is used for 2.5in SSD or mechanical hard disk. It has PCIE, SATA, SAS signal.3. High Speed: This PCIe 4x to u.2 SFF8639 expansion card adopts SpeedPlus.Link high speed signal reinforced technology for stable and faster transmission.4. Low Delay: The U.2 interface supports NMe standard protocol, low delay and low power consumption.5. Note: The mainboard that does not support NVMe cannot serve as a system disk but only as a storage disk.Specification:Item Type: U.2 to Pcie AdapterMaterial: Printed circuit boardInterface: PCI-E 4XPower Port: SATA 3.0Hard Disk: 2.5in SSDSupported System: Suitable for Win 7, for Win 8, for Win 10, for OS X, for Linux..Package List:1 xU.2 to Pcie Adapter1 x SATA Cable4 x Screws Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.