During the day, WLTI broadcast with an omnidirectional pattern; at night, it broadcast with a directional signal to the southeast and southwest, to protect Class-A clear-channel stations CBEF in Windsor, Ontario and XERUV-AM in Xalapa, Mexico.
For many years, WMDH featured a news/talk format followed by a long stint as adult standards with programming supplied by the Music of Your Life 24/7 satellite format and later with Citadel Media's Timeless Classics.
In early 2010 Timeless ceased operations, forcing WMDH to change format.
In 2010, Citadel Broadcasting opted to retain the call letters of a station that changed format in Syracuse, New York, to keep for future use.
The WMDH-FM call letters continue to be used on WLTI's sister station in New Castle.