Features: brand new and high quality 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 for play! Need machine support, BIOS settings, kind of complicated! With 4 LED working state indicators, more convenient Specifications: Item: PCIE 4.0 to U.2 NVME Expansion Card Model: PH49 Material: PCB Slot: PCIE X4 X8 X16 Expansion Slot: SFF-8643 Port: 4 Ports Size: approx 120x150mm / 4.72x5.91in Package Includes: 1 PC x Expansion Card note: Please make sure that your motherboard PCIe x16 slot supports pcie signal splitting. For details, please consult your motherboard's official customer service. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment.