Features: 1.STABLE PERFORMANCE: PCIE X4 to U.2 adapter card has stable performance, high speed lossless transmission, and strong compatibility 2.CONVENIENT and PRACTICAL: The card has PCIE X4 to SFF 8643 interface, PCIE X4 to SFF 8643 interface needs to be used with U2 cable 3.THICK GOLD PLATED PROCESSING: PCIE X4 to U.2 adapter card has thick gold plated gold fingers to make data transmission more stable 4.WIDELY COMPATIBLE: PCIE X4 interface can be compatible with PCIE Express X4/X8/X16 slots at the same time, no motherboard model compatibility requirements 5.SUPPORT SYSTEM: The PCIE expansion card supports Win system, which can meet the needs of general users specification:Item Type:PCIE Expansion Card Material: PCB Product Model: PH49 Applicable Slots: PCI E X4/X8/X16 Expansion Interface: SFF-8643 Support System: For Win Product Size: Approx. 120 x 79 x 35mm / 4.7 x 3.1 x 1.4in PackageList: 1 x PCIE Expansion Card 1 x Screw