This part is entirely optional. We placed a video splitter on the camera and ran it to a 800mW 900Mhz radio transmitter. Now, a word of caution. You do need an Amateur Radio License to legally operate something of this power. It is true that you can buy them anyways, but it is good to stay legal. The nice thing is, it is easy to get your license.
The information needed to get your license is located here:http://wireless.fcc.gov/services/index.htm?job=service_home&id=amateurhttp://www.arrl.org/