CKLW is a 50,000 watt, Class B, AM radio station broadcasting on the Mexican clear-channel frequency of 800 kHz (800 AM) and located in Windsor, Ontario, Canada, serving Windsor and Detroit. Additionally, its signal can be heard as far west as Grand Rapids, Michigan; as far east as Batavia, New York (and, at night, Boston, Massachusetts); as far south as Edgewood, Kentucky; and as far north as Posen, Michigan. CKLW uses a five-tower directional antenna with differing patterns day and night, to protect Class-A clear-channel station XEROK-AM in Ciudad Juárez, Mexico, and other neighboring stations on the same frequency.