https://www.qnap.com/en/product/nic_pc

Dual-port, 5-speed 10 GbE network expansion card
Controller: Aquantia AQtion AQC107S; Driver download: From Aquantia (not required for QTS)
Connector: NBASE-T (RJ45)
PCIe interface: PCIe Gen 2.0 x4
Transmission rates: 10Gbps/5Gbps/2.5Gbps/1Gbps/100Mbps
Supported operating systems: QTS; Windows (Driver required); Linux (Driver required)
Supported QNAP NAS: Models with PCIe slot(s) (1 free slot required)
Bracket: Low-profile bracket pre-installed; full-height and specialized (for selected QNAP NAS) brackets are bundled
Port and cable: RJ-45; over CAT-6 class cable
Package Content: 1 x Network card; 1 x QIG; 3 x Brackets