Fangrui Product Details Skn-x520-1sfp+10g Single Optical Port Pcie Nic: Suitable For A Variety Of Hosts, Servers And Other Equipment Original Chip: Itadopts X520 10gb Ethernet Control Chip, Fast Connection Without Delay, But With Smooth Use, Sensitive Response And Stable Performance. Compatible With Multiple Operating Systems: It Owns Good Compatibility, Which Can Work Efficiently On Multiple Operating Systems. Pci-e X8 Slot: It Adopts Gold-plated Gold Fingers, To Prevent Surface Oxidation, Improve Contact Performance, Conduction Performance And Service Life. Colour:as Shown Material:pc Due To Different Product Batches, The Appearance May Vary, Which Does Not Affect The Use Package Contents: 1 * 10g Sfp 1 * 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.