http://www.gadgettown.com/Ethernet-Adapter-Usb-To-Lan-Rj45-Card.html
The Card Network, self power, no power adapter required. Easy to install, super streamline configuration with compact design. Integrated fast Ethernet MAC, physical Chip and transceiver in one chip, allow you to enter into fantastic network world in a second. Ideal solution for 10 / 100 Mbps Ethernet networking systems based on USB and twisted pairs and make network maintenance cost low.