This PCIe to 4-port 2.5G Ethernet network adapter can provide 2.5 Gigabit Ethernet network faster than Gigabit network speed, support high-performance dual-channel network and full-duplex communication to achieve speeds up to 2500 Mbps and fast transfer rate, compatible with existing Ethernet. Supports 2.5G Lite (1G data rate) mode. Supports PCI Express 2.1. Supports 4 high performance 2.5-Gigabit LAN ports. Auto-Negotiation with Extended Next Page capability (XNP). Compatible with NBASE-TTM Alliance PHY Specification. Supports pair swap/polarity/skew correction. Crossover Detection & Auto-Correction. Supports hardware ECC (Error Correction Code) function Supports hardware CRC (Cyclic Redundancy Check) function Transmit/Receive on-chip buffer support Supports PCI MSI (Message Signaled Interrupt) and MSI-X Supports power down/link down power saving/PHY disable mode Supports ECMA-393 ProxZzzy Standard for sleeping hosts Supports LTR (Latency Tolerance Reporting) Supports 32-set 128-byte Wake-Up Frame pattern exact matching Supports Microsoft WPI (Wake Packet Indication) Supports PCIe L1 substate L1.1and L1.2 Compatible with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab Supports IEEE 1588v1, IEEE 1588v2, IEEE 802.1AS time synchronization Supports IEEE 802.1Qav credit-based shaper algorithm Supports IEEE 802.1P Layer 2 Priority Encoding Supports IEEE 802.1Q VLAN tagging Supports IEEE 802.1ad Double VLAN Supports IEEE 802.3az (Energy Efficient Ethernet) Supports IEEE 802.3bz (2.5GBase-T) Supports Full Duplex flow control (IEEE 802.3x) Supports jumbo frame to 16K byte Supports standard and low profile chassis System Requirement Windows OS Linux, for MAC OS and DOS PCI Express-enabled system with an available PCI Express slot. Material: PCB+Metal colour: black Package Contents: 1 x PCI-Express to 4 Ports 10 /100/100