By looking at the installation guide it looks like it's a transmitter to the router

USR5470 Package Contents:

USR5462 802.11g 54Mbps Router
One (1) Ethernet cable
19VAC Power Supply
USR5422 54Mbps USB Adapter
Installation Guide
Installation CD-ROM

You will lose your wireless internet if you don't find a way around it

I don't know a way btw