Two hard drives have LED work lights. Steady power on, flashing when reading and writing. NVME two-disk design, stable installation, can run 2 NVME disks at full speed at the same time. Support 2U server small chassis installation, built-in multiple sets of high-power DC modules can continue to work stably. Inherit high-speed signal enhancement technology to ensure the stability and security of big data processing, which can be widely used in data acquisition, data mining, image processing, video processing, cloud computing and other fields, can be developed again according to user needs to meet more applications Scenes. Important Tips: dear friend, please make sure your motherboard supports that can split PCIE channels/Raid function. Otherwise only support one nvme. Thanks! Specifications: Item name: PCIE X8 two-disk NVME expansion card Chip: ASM1182E Support: Only supports motherboards that can split PCIE channels. Color: Black Material: PCB+Metal Package Contents: 1 x PCIe X8 to 2 Port M.2 NVMe SSD Adapter Card