WOSO (1300 AM) is a Class B regional radio station licensed to MAYAGUEZ, PR. Operating with 5 kW daytime power using a directional (different day/night patterns) antenna system with 2 towers. At night it operates at 800 watts. After sunset, skywave propagation can extend the signal across much of the surrounding region. The station is owned by Wifredo G. Blanco-Pi. It broadcasts a News Talk Information format.