USB 3.0 male A 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, Nintendo Switch 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. Full 10/100/1000Mbps gigabit Ethernet performance over USB 3.0's 5Gb/s bus, faster and more reliable than most wireless connections. Link and Activity LEDs. USB powered, no external power required. Backward compatible with USB 2.0/1.1.