Features: brand new and high quality System Interface Type; PCI-E2.0 (2.5GT/s). Transmission Speed: 10/100/1000 Mbps. Transmission medium Type : UTP Web standards : IEE 802.1p, IEE 802.1Q, IEE 802.3ab, IEE 802.3.1. Operating system;for Windows Server 2003, Enterprise,Detacenter(32-and 64-bit)Windows2000 Red Hat Linux 24x or later(32-and 64-bit)FreeBSD 1x or later Specifications: Chipset: for Intel 82576 Support PCMCIA Standard: No. System Interface Type:PCI for Express 2.0(2.5GT/s) Support full-duplex: Yes LED Indicator : 4 LED Lights. Port Type: 2xRJ45 Transmission Speed: 10/100/1000 Mbps. Transmission Medium Type : 3/4/5 UTP Web Standards : IEE 802.1p, IEE 802.1Q, IEE 802.3ab, IEE 802.3.1. Operating system; for Windows Server 2003, Enterprise,Detacenter(32-and 64-bit)Windows2000 Red Hat Linux 24x or later(32-and 64-bit)FreeBSD 1x or later Material:PCB Size:Approx.13.3x6.8cm/5.23x2.68in Package Includes: 1x 82576 EB/GB Network Card note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!