Feature: 1. Integrated 10M BASE-T and 100/1000M/2.5G BASE-T 802.3 compatible transceiver. 2. Supports 2.5G Lite (1G data rate) mode. 3. Auto-Negotiation with Extended Page capability (XNP) 4. Compatible with NBASE- Alliance PHY Specification. 5. Supports PCI 2.1. 6. Supports pair swap/polarity/skew correction 7. Crossover Detection & Auto-Correction. 8. Supports 1- 2.5/5Gbps PCI Bus 9. Supports hardware ECC (Error Correction Code) function. 10. Supports hardware (Cyclic Redundancy Check) function 11. Transmit/Receive on-chip buffer support. 12. Supports PCI (Message Signaled Interrupt) and -X Supports power down/link down power saving/PHY disable mode Supports ECMA-393 ProxZzzy Standard for sleeping hosts Supports LTR (Latency Tolerance Reporting) Wake-On-LAN and 'RealWoW ' Technology (remote ) support Supports 32-set 128- Frame pattern exact matching Supports WPI (Wake Packet Indication) Supports PCIe L1 substate L1.1and L1.2 Compatible with IEEE 802.3, IEEE 802.3u, IEEE 802. 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 bytes Support ESXI 6.7(7.0 not support) Support Black Dress/PVE/Ikuai/Unraid 6.9.2/OpenWrt System Requirements: Windows OS Linux, OS and PCI -enabled system with an available PCI slot color: Black Material: ABS+Metal Package Contents: 1 x PCI Express Adapter Card 1 x Low Profile Bracket 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.