1,Fast Transmission: 1000M gigabit network card meets the needs of high speed network, supporting 1000Mbps transmission rate. 2,Stable and Reliable Connection: PCIe X1 network card adopts for RTL8111H chip to ensure the stability and reliability of connection. 3,Multi Port Design: Desktop gigabit network card provides 4 RJ45 copper ports to connect multiple devices, expanding your network capacity and providing efficient data transfer. 4,Flexible Adaptation: Gigabit network card is suitable for different sizes of machines, supporting PCIe X1, X4, X8, X16 slot widths. 5,Wide Compatibility: 1000M network card is suitable for Windows 32 or 64 bit, for Linux, for AYOS, for OS X, for FREEBSD, for DOS, for ROS operating system. Item Type: Desktop Network Card Material: PCB Chip: for RTL8111H Network Cable Interface Type: 4 x RJ45 Copper Port Slot Interface Type: PCI Express2.0(2.5GT or s) Bus Speed and Slot Width: X1, Support X4, X8, X16 Transmission Rate: 10 or 100 or 1000Mbps IEEE Network Standard Network Technology: 10BASE T,100BASE TX,1000BASE T Applicable Network Type: Gigabit Ethernet LED Indicators: 8 LED Indicators Full Duplex Half Duplex: Full Duplex Half Duplex Adaptive Support OS: for Windows ME 98SE 2000 XP, for Windows 7 or 8 or 10 32 or 64 Bit, for Windows Server 2003 2008 2012 32 or 64 Bit, for Linux, for AYOS, for OS X, for FREEBSD, for DOS, for ROS 1 x Network Card 1 x CD ROM 1 x Short Baffle Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.