WSFS (950 AM) is a Class B regional radio station licensed to CHICAGO, IL. Operating with 1 kW daytime power using a directional (different day/night patterns) antenna system with 7 towers. At night it operates at 5 kW. After sunset, skywave propagation can extend the signal across much of the surrounding region. The station is owned by Relevant Radio, Inc. It broadcasts a Catholic Christian talk and teaching format.