With 4 U.2 Nvme SFF-8643 expansion ports. This product can only be used on PCIE slots that support PCIe split. Supports using SSF-8643 to SFF-8639 cable to connect to U.2 SFF-8639 solid state drive, this product does not include SSF-8643 to SFF-8639 cable Support PCI-E4.0, support 2U chassis, high-speed lossless transmission, strong compatibility This product is not plug and play Need machine support, BIOS settings, kind of complicated With 4 LED working state indicators, more convenient Specifications: Colour: Black material: plastic Item: PCIE 4.0 to U.2 NVME Expansion Card Model: PH49 Slot: PCIE X4 X8 X16 Expansion Slot: SFF-8643 Port: 4 Ports Size: approx 120x150mm / 4.72x5.91in Note: Please make sure that your motherboard PCIe x16 slot supports pcie signal splitting. For details, please your motherboard's official customer service. Package Contents: 1 x Pcie 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.