With our usb 20 to fast ethernet adapter you are able to use the full speed of your fast ethernet network without having to open your pc and add an internal network adapter you can connect your device to the internet or to a printer transfer files join multiplayer games and much more nowadays ultrabooks subnotebooks macbooks air etc have no ethernet ports anymore our adapter solves this problem due to his low power consumption of 170 ma the adapter can be used even with a macbook pr