Qnap Dual M.2 22110/2280 PCIe NVMe SSD expansion card Connector:

Qnap Dual M.2 22110/2280 PCIe NVMe SSD expansion card Connector: 2 x M.2 22110 or 2280 PCIe (Gen3 x 4) NVMe SSD slots PCIe and Lanes: PCIe Gen3 x 4 Bracket: Low-profile (default). Low- profile flat and Full-height brackets are also included.