Welcome to the store! 1. 1000Mbps: Gigabit Ethernet card uses RTL8111H main controller chip, stable performance and excellent compatibility. Supports high-speed dual-channel networking with maximum data transfer rate of 1000 Mbps in each direction (2000 Mbps total). 2. Efficient heat dissipation: Large heat sink effectively dissipates excess heat to prevent damage from high temperatures, improve working efficiency, and extend lifespan. 3. Gold pin: Thicker gold pin for more reliable connection, reducing hardware contact errors and minimizing the risk of packet loss and distortion. 4. Support System: For Windows 7, 8, 10, and Windows Server 2008 R2, 2012, 2016, 2019, for Linux 2.6.31 to 4.11.x LTS versions. 5. Network compatible: 10BASE-T Ethernet card is backward compatible with 10/100BASE-T networks. M.2 (B Key, M Key) to PCIe Gigabit Ethernet card transfer speed, faster and more stable. No driver required. With LED indicator Product type: M.2 PCI E Gigabit Ethernet Card Material: PCB Bus type: M.2 (B Key, M Key) Main controller chip: For RTL8111H chip Cable length: Approximately 30 cm / 11.8 inches Adapter card size: Approximately 4 x 2 cm / 1.6 x 0.8 inches Network adapter card mounting: Approximately 12 cm / 4.7 inches Applicable network type: Fast Ethernet Transfer speed: 10 Mbps, 100 Mbps, 1000 Mbps Full Duplex, Half Duplex: Full Duplex, Half Duplex Adaptive Network connection type: RJ45 LED indicator: LINK, ACT (connection status) Applicable models: Desktop computer Network standard: IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE TX, IEEE 802.3ab 1000BASE T, IEEE 802.3az Energy Efficient Ethernet, IEEE 802.3x Flow Control, 802.1q VLAN Tagging, 802.1p Layer 2 Priority Encoding