I226-V Two Ports 2.5Gbps PCI Express Gigabit Ethernet Card Standard:IEEE802.3, IEEE802.3u, IEEE802., IEEE802.3az, IEEE802.3bz Supports IEEE802.3az(Energy Efficient Ethernet) Supports IEEE802.3bz(2.5GBASE-T) Supports Full Duplexflowcontrol(IEEE802.3x) Standard RJ45 Port: 2.5G Ethernet adapter supports three data transferrates: 100M/1000M/2500M Dual Baffles: Comes with 12cm standard bracket and 8cm low-profile bracket,works with different size PCs. : Compatible with for Windows10, Linux Linux 4.20/5.x or later, Linux Cent OS/RGEL 8.1 or later, 14.x/15.x/16.x or later PCIExpress, Convertsa PCIe x1, x4, x8 or x16 slot. Warm Tips:When you receive the product.Please install the driver. Color:Black Material:Plastic+Metal Package Contents: 1 * Gigabit Ethernet Card 1 * Baffle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.