Dual-port 10GBASE-T 10GbE network expansion card Connection: Wired PCIe interface: PCI Express 3.0 x4 Transfer rates: 10 Gb/s Supported QNAP NAS: Models with a PCIe slot (1 free slot required) Bracket: Low-profile bracket pre-installed; full-height and device-specific brackets (for select QNAP NAS) included.