PCI Express X16 to Dual M.2 NVME-Compatible M Key+PCIe 4.0 X16(X8 Signal) Slot Riser Card Motherboard Support PCI-E Bifurcation. Dual NVMe PCIe Adapter can add 2x M.2 NVMe SSD Slot via PCIe 4.0 x16, but also expand extra PCIe x16 slot (x8 Signal), which can use for expanding any other PCIe Device. Compatible with M.2 PCI-e NVMe SSDs in all sizes. Upgraded Design with individual LED Indicator design will show each SSD's Working Status.