The dub e100 is a high speed usb 20 10100mbps fast ethernet adapter for windows based desktop and notebook pcs this adapter is designed to simply plug into any available universal serial bus usb port on your computer to connect you to a fast ethernet network based on usb 20 the adapter extends the transfer speed of earlier usb fast ethernet adapters to true 10100mbps connectivity the usb port of the adapter gives you throughput of up to 480mbps to your computer thats about 40 time