How do I add a fast Gigabit Ethernet port to a thin laptop or MacBook without a built-in internet port? The TP-Link UE300 is a portable SuperSpeed USB 3.0 to Gigabit Ethernet network adapter. It provides high-speed, stable wired internet access via any standard USB port, making it a perfect accessory for professionals who need lag-free connection speeds for downloading large files, video conferencing, and streaming.