102.5 Hit Channel was an Italian CHR station which now goes under the name "RTL 102.5" They appear to be a national station with offices in Rome, Milan and Naples.
Flash FM 94.900 is (or was) from somewhere in Italy. The stickers were printed by Ma Ma Studio which is based in Forli, Italy. The words translate to something like "new signals from your radio" and "polyphonic."
Radio Paneburromarmellata is a station on six different frequencies based around Bologna, Italy. Their name translates to Radio Bread, Butter and Jam and seems to have a Hot AC/CHR format (although the Top-10 on their website hasn't been updated since 2009.)
Google didn't offer any information about Radio K but I do know that it's from Vicenza, Italy. The US flag and probable "American Music" format might have something to do with the fact that the United States Army's Camp Ederle is based in Vicenza.