WDEO (990 AM) is a Class B regional radio station licensed to YPSILANTI, MI. Operating with 9 kW daytime power using a directional (different day/night patterns) antenna system with 4 towers. At night it operates at 250 watts. After sunset, skywave propagation can extend the signal across much of the surrounding region. The station is owned by Ave Maria Media Services. It broadcasts a Religious broadcasting format.