Question re FM transmitter used at Arisia

[kestrell.livejournal.com]

I'm trying to find out more info regarding the FM transmitters used at this past Arisia. Could a knowledgeable person tell me the following:
would this equipment be available for loan at another Boston-area con, such as Readercon?
how are such transmitters set up?
What is the official brandn name of the equipment, and what is the cost of such equipment?

Thanks in advance.