It airs a format of Adult Contemporary music in English with News and Talk programs in Spanish.
XHMM-FM is a Class C station with an effective radiated power (ERP) of 100,000 watts.
In 1977, the station was acquired by SOMER (Sociedad Mexicana de la Radio), which on July 17 of that year relaunched it as "Stereo Cien."
It began airing adult contemporary music in English as well as news and talk programs in Spanish.
XHMM carries adult contemporary music from the 1980s to the present and the "Enfoque" newscasts on weekdays.