Lenovo USB Type C to RJ45 female Ethernet adapter connects your computer or tablet to a router, modem or network switch for network connection. It adds a standard RJ45 port to your Ultrabook, notebook or Macbook Air for file transferring, video conferencing, gaming, and HD video streaming. Protect the RJ45 LAN port in your expensive computer, or replace a broken Ethernet port. Link and Activity LEDs. USB powered, no external power required.