First , glad to see people listening in to the feed, ..
Maikha ly , not sure just what you after here, All you need to view flight radar is to follow the provided link, and look at any where in the world your interested in, .
If your asking about the feed into the system, you need something like a ADSB box, I my case its from Kinetic
http://www.aircrafttrackingavionics.com.au/
Cost is around $800 for the SBS_3. but there are cheaper options.