The NXTBee USB is a radio for communicating with your NXTBee devices, allowing you to send and receive information to the NXTBee from your computer. Send data to your NXT, receive data from yuor NXT.
The adapter comes in two flavors: NXTBee and NXTBee PRO. Each comes with a Mini-USB cord to connect the adapter to your computer.
So what can you do with the NXTBee USB? Here’s an example we put together a few months ago with Laurens Segway.
And here’s an example of a remote controlled submersible LEGO MINDSTORMS NXT that uses the NXTBee, coupled to a computer.