Qnap Dual-Port 10GBase-T Network Expansion Card (LAN-10G2T-X550) - Controller: Intel X550, Connector: Base-T (RJ45), PCIe Interface: PCIe Gen3 x4, Transmission Rates: 10Gbps, Supported Operating Systems: QTS/QuTS Hero, Windows 10 (1809 or later), Linux Stable Kernel 4.20/5.x, Windows Server 2019 (Driver required), Supported QNAP NAS: Models with PCIe Slot(s) (1 free Slot Required), Port and cable: RJ-45 Over CAT-6 Class Cable