WRTI is a member-supported radio service of Temple University in Philadelphia. It broadcasts on a frequency of 90.1 MHz and is repeated on several relay radio stations throughout eastern Pennsylvania, southern New Jersey and Delaware. The station's schedule is divided between classical music during the day and Real Jazz in the evening and over-night period. (The station's HD-2 subchannel reverses this pattern, playing jazz by day and classical by night.) The Arbitron ratings service reports the station has the second largest audience among Philadelphia's public radio stations.