KLJY (branded as Joy FM) is a commercial-free contemporary Christian radio station serving the Greater St. Louis area who bought the former KFUO-FM signal. KLJY located in Clayton, Missouri, operates at 99.1 MHz. It is transmitted with an effective radiated power of 100 kW. Its transmitter is located in Shrewsbury, Missouri. The studio is located in Des Peres, Missouri. In addition to broadcasting music, the station also sponsors community service events and activities throughout the St.