This product is either discontinued or we cannot get that from suppliers.
Qnap Dual-Port QXG-10G2SF-CX4, 10Gigabit Ethernet Card, PCI Express 3.0 x8, Port 2, Expansion Slot Type SFP+, Network Technology 10GBase-X, FF Plug-in Card, Device Supported NAS Storage Device.
QNAP offers various cost-effective network expansion cards for businesses and home users to easily upgrade the bandwidth of their QNAP NAS, servers and computers to accommodate high-speed data.