This is a universal 2.5Gbps Ethernet PCI Express card. Users can convert a standard RJ45 network port through the host's PCIE x1, x4, x8 or x16 slot. It is mainly designed to improve the speed requirements of users when playing e-sports games. It supports high-performance dual-channel network and full-duplex communication to achieve a transmission rate of up to 2500Mbps, and is compatible with existing Ethernet. The 2.5G Ethernet network provided by this network card can improve the efficiency of data transmission and processing within the enterprise, and can also increase the speed of general users transferring files between multiple network devices . This also make the increasingly popular network video transmission smoother, and is a preferred solution for consumers to upgrade to 2.5G network. Support 1- 2.5/5Gps PCI Express bus Support PCI Express 2.1 Support 2.5G and 1Glite mode 10/100/1000M/2.5Gbps data rate automatic detection Support detection and automatic correction Fully compliant with IEEE802.3, 802.3u and 802. Support IEEE 1588v1, IEEE 1588v2, IEEE 802.1AS time synchronization Support IEEE 802.1Qav credit-based shaping algorithm Support IEEE 802.1ad dual VLAN Support IEEE 802.3az (Energy Efficient Ethernet) Support IEEE 802.3bz (2.5GBase-T) Support IEEE 802.1P Layer 2 priority encoding Support 802.1Q VLAN tagging Support full-duplex flow control (IEEE.802.3x) Support 16K-byte large frames Support Virtual Machine Queues (VMQ) Support Quad-core Receive Side Scaling (RSS) Support protocol offload ( & NS) Support ECMA-393 ProxZzzy standard for sleeping hosts Colour:black Material:plastic The actual product may have slight color difference or difference, which not affect the use Package Conten: 1 x Network Card 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.