The ThinkPad USB 3.0 Ethernet adapter enables Ethernet on systems which do not have Ethernet RJ-45 connector through USB port on the system. The ThinkPad USB 3.0 Ethernet adapter not only provides high-speed Gigabit Ethernet solution via USB 3.0 port but also enables boot over the LAN on selected ThinkPad systems. Connect it with your Ultrabook or Tablet to your corporate VPN at the office or go online in your hotel while you're travelling. The adapter's small form factor allows a convenient fit into any computer case or travel bag, so you can easily take it with you anywhere.Full-size RJ45 connector; LEDs on connector to indicate connection status Two LEDs on RJ45 port to indicate power and data transfer. Green for power and yellow for activity. Booting from LAN and loading image from remote server both on legacy BIOS and UEFI BIOS system QoS (Quality of Service) tagged packets and duplicate address detection Doesn't support POE (Power over Ethernet) Gigabit speed when running on USB3.0 environment 100M/10M adapt when running on USB2.0 environment Full Duplex flow control (IEEE 802.3x) Compliant with IEEE 802.3 and IEEE 802.3u IEEE 802.3az Gigabit Ethernet requirement