What is "wwzz"

WWZZ/WWVZ were a pair of simulcasting radio stations in Washington, D.C., owned by Bonneville International. The station broadcast from Braddock Heights, Maryland at 103.9 MHz FM and from Waldorf, Maryland, at 104.1 MHz FM. It was commonly known as Z104 with the slogan "Washington's Modern Music." The station was also known for its community efforts and donation drives for local charities. Furthermore, as a member of the Nationals Network, it offered radio coverage of a large portion of the Washington Nationals games.