Features: brand new and high quality The PCIE gigabit network card adds a 10/100/1000 Mbps/2.5G compatible RJ45 Ethernet port to a PCI Express-enabled client, server or workstation, providing a convenient addition or replacement networking interface. Fully compliant with IEEE 802.3/u/ab standards offers effective network performance. With gigabit speed and Link/Activity LED indicators Complies with micro soft and Linux platforms Full and half duplex support; Pxe network boot support Specifications: Bus width: 2.5 Gbps PCI for Express Bus Connectors: 4 x RJ45 Data rate 10/100/1000M/ 2.5G Applicable Network Type: Gigabit Ethernet Network Standard: Compliant with IEEE 802.3/u/ab Transmission Medium: Wired Port Type: RJ-45 LED Indicator: Yes Package Includes: 1 x 4-port Gigabit Server Network Card note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.