PCIe Network Card 4 Port 1000Mbps Transmission PCI Express 1.1 Gigabit Ethernet Card for Server Desktop Computer Item Type: PCIe Network Card Material: Printed Circuit Board Ports: 4 Ethernet Ports Applicable Network: Ethernet Full Duplex/Half Duplex: Full Duplex Flow Control Chip: RTL8111H Transmission Rate: 10/100/1000Mbps Bus Type: PCI Express 1.1 Supported Protocols And Standards: csma/CD LED Indicator: 10/100/1000Mbp Applicable Operating Systems: For Win 10(32/64), 8/81(32/64), 7(32/64), For Vista(32/64), For XP(32/64), 2000 Ambient Operating Temperature: 0℃ to 70℃ Relative Humidity: 10% to 90% (No Condensation) Storage Temperature: Minus 10℃ to +80℃ Relative Humidity: 5% to 90%(No Condensation) Product Size: Approx. 110 x 55 x 20mm / 4.3 x 2.2 x 0.8in ( Manual Measurement, Slight Error May Exist )