Wikipedia
WCFS-FM
WCFS-FM (105.9 FM), known on-air as "WBBM Newsradio 780 & 105.9", is a radio station licensed to Elmwood Park, Illinois and serving the Chicago, Illinois market. It is owned and operated by CBS Radio. WCFS-FM broadcasts from a 4.1kW transmitter atop Willis Tower, and its studios are located at Two Prudential Plaza in the Loop.