This is an official Apple adapter that can be used when a wired LAN connection is needed, such as with a MacBook. Model Number: MC704ZM/A Interface: USB 2.0 – Ethernet (10/100BASE-T) Size: Small and lightweight, convenient to carry Supported OS: macOS / Windows (Can be used immediately without drivers) As it is a genuine product, it has high stability and is especially reliable for wired connections during remote work or business trips. It is a used item, but operation has been confirmed. There are no noticeable scratches or stains, and it can be used immediately. *This is a listing for the main unit only (no box or manual).