Add one Gigabit Ethernet and one USB 3.0 port to your Thunderbolt-equipped Mac or PC with the Thunderbolt to Gigabit Ethernet and USB 3.0 Adapter from StarTech. Two dedicated lanes connect your Thunderbolt adapter directly to the system PCIe bus. Each lane delivers 5 Gbps bandwidth so you effectively avoid performance bottlenecks when both ports are in use. The adapter is plug-and-play compatible and is powered by the computer, requiring no external power supply.