WISP (1570 AM) is a Class B regional radio station licensed to DOYLESTOWN, PA. Operating with 5 kW daytime power using a directional (different day/night patterns) antenna system with 4 towers. At night it operates at 900 watts. After sunset, skywave propagation can extend the signal across much of the surrounding region. The station is owned by Holy Spirit Radio Foundation, Inc. It broadcasts a Religious broadcasting format.