This is an Apple-genuine Thunderbolt to Gigabit Ethernet Adapter. It's an adapter for connecting a Mac to a wired LAN (Ethernet). - Compatible with Macs with Thunderbolt ports - Gigabit Ethernet compatible (up to 1Gbps) - Apple genuine product Includes original box. There are some minor scratches and dirt from use, but no major noticeable damage. *Please confirm the operating environment and compatible models before purchasing. Please only purchase if you understand that this is a used item and has been stored at home.