I don't know either, but I want one. I can put the GPS antenna in it.....
so its for like a 4 meter antanna or a ham radio somthing like that
many times airports and places like that require regular users to have a "transponder" (similar to a "pikepass") to identify who they are and how often they come and go. Just my wild guess that it is something like that! BK
Matt,Wrong John, LOL. Its VickersBryan