Features: Boost your internet speed with this versatile fiber optic networking card Single-port 10GbE SFP port compliant - IEEE802.3ae compliant - Layer 2 functionality: IEEE 802.3x flow control - IEEE 802.3ae compliant Supports Receive Side Scaling Supports IPv 4, IPv 6 protocols Supports jumbo frames up to 15.5K - Supports checksum offload - Management statistics and RMON Support for virtual machine device queues Interrupting throttling control to limit interrupting rate and increase CPU utilization Specifications: Item: M.2 To 10G Single Optical Port Fiber Networking Card Key Features: PCIExpress Host Interface Specification v2.0 Bus width of 5GT/s PCIExpress channels: x8 Chipset: JL82599EN Driver support FreeBSD, Linux, VMWare ESXi, Win7/ Win-server2012/ Win-server2008/ Win8/Win8.1/Win-server2016/win10 Package Includes: 1PCS M.2 To 10G Single Optical Port Fiber Networking Card note: Due to problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to measurment.