HIGH PERFORMANCE: 2.5GbE USB A to Ethernet Adapter allows you to securely connect to high-speed Networks and is backwards compatible with existing Gigabit LANs NBASE-T & 2.5GBASE-T: USB 3.1 Ethernet adapter offers bandwidth for content creators & power users on high performance Laptops/Workstations incl. Lenovo ThinkPad X1 Carbon Dell XPS HP EliteBook/ZBook USB 3.0/3.1 Type-A 1x RJ45 5 Gbps Multi-Gigabit 3 Speed 2.5G/1G/100 Mbps auto-negotiation