Features: brand new and high quality This is a universal 2.5Gbps Ethernet PCI for Express card. Users can switch to a standard RJ45 network port through the PCIE x1, x4, x8 or x16 slot of the host. It is mainly aimed at improving the speed of users in gaming games. Designed for the needs of the company. It supports high-performance dual-channel network and full-duplex communication to achieve a transmission rate of up to 2500Mbps, and is for existing Ethernet. The 2.5G Ethernet network provided by this network card can improve the efficiency of internal data transmission and processing, and can also increase the speed of transferring files between multiple network devices at home for general users. System requirements: for Windows ME, 98SE, 2000, XP, Vista, 7, 8, and 10 32-/64-bit; for Windows Server 2003, 2008, 2012 and 2016 32-/64-bit; Linux, for Mac OS and DOS. Packing list: 1x PCI for Express to Gigabit Ethernet Control Card, 1x User Manual, 1x Drive CD, 1x Short Iron Sheet. Specifications: Material: PCB Color: As the Picture Shows Product Dimension: approx. 6.5x4.5cm/2.56x1.77inches Net Weight: 200g/0.44lbs Package Includes: 1x PCI for Express to Gigabit Ethernet Control Card 1x User Manual 1x Drive CD 1x Short Iron Sheet note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.