"USB Ethernet Adapter" : Live Tech Sprint 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 or Macbook Air for file transferring, video conferencing, gaming, and HD video streaming. "Protect or Replace a Broken Ethernet Port" : USB 3.0 to Gigabit Ethernet Adapter is a good accessory to protect the RJ45 LAN port in your expensive computer, or replace a broken Ethernet port. "Speed up to 5Gbps" : Full 10/100/1000Mbps gigabit ethernet performance over USB 3.0's 5Gbps 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. "Wide Compatibility" : This USB RJ45 adapter work with Windows