Features: brand new and high quality Form factor pci-express 1.1-Line 1x2.5 Gbps. Complies with 1Gb RJ45 dual port. Complies with IEEE802.3ab, IEEE802.3u and IEEE802.3 Half duplex at 10 / 100Mbp operation and full duplex operation at all supported speeds. Layer 2 features: IEEE 802.3x-VLAN IEEE 802.1q flow control. Supports receiver lateral scaling (for RSS). Supports IPv 4, IPv 6 protocols. for Jumbo frames up to 9K. Supports checksum download. Chipset: for Intel 1210. Specifications: Media interface: RJ45 Transmission rate: 10/100/1000Mbps PCI-E slot : PCI-E X1X4X8X16 Network standards: IEEE 802.1p, IEEE 802.2, IEEE 802.3ac, IEEE 802.3az, IEEE 802.3x, IEEE 802.3z, IEEE 802.3ad Working temperature: 0 ~ 70 ℃ (32 ~ 131℉) Operating system: FreeBSD, Linux, VMWare ESXi, Win 7/ Server2012/ Server 2008/ Win 8/Win 8.1/Server 2016/Win 10 Package Includes: 1PC x 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.