1、1000Mbps: Gigabit ethernet card uses for RTL8111H main control chip, stable performance and good compatibility. Support high performance dual channel networking with maximum data transfer speed of 1000Mbps in each direction (2000Mbps in total). 2、Efficient Heat Dissipation: Solidly heat sink can effectively discharge excess heat to prevent high temperature damage, improve work efficiency and extend service life. 3、Gold Pin: Thickened gold pin for more reliable connection, reducing hardware contact failure and less likely to cause packet loss and distortion. 4、Support System:For Windows 7, 8 ,x, and 10, for Windows Server 2008 R2,2012,2016,2019, for Linux 2.6.31 to 4.11.x.LTS version 5、Network Compatible: 1000baset t Ethernet controller card is backward compatible with 10 100baset t network. m.2 (B Key,M Key) to PCIE Gigabit Ethernet card transmission speed, faster and more stable. No driver. With LED indicator Item Type: M.2 PCI E Gigabit Ethernet Card Material: PCB Bus Type: M.2(B Key,M Key) Main Control Chip: For RTL8111H chip Cable Length: Approx. 30cm / 11.8in Adapter Card Size: Approx. 4 x 2cm / 1.6 x 0.8in Network Adapter Card Bracket: Approx. 12cm / 4.7in Applicable Network Type: Fast Ethernet Transmission Rate: 10Mbps 100Mbps 1000Mbps Full Duplex, Half Duplex: Full Duplex, Half Duplex Adaptive Network Connection Type: RJ45 LED Indicator: LINK, ACT (Connection Work) Applicable Models: Desktop Computer Network Standard: IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE TX, IEEE802.3ab 1000BASE T, IEEE 802.3az Energy Effcient Ethernet, IEEE 802.3x Flows Control, 802.1q VLAN Tagging, 802.1p Layer 2 Priority Encoding 1 x Adapter Card 1 x Network Adapter Card