Its syncopated beats use Latin percussion, brass instruments, bass, and piano or keyboard. Between 1937 and 1950 merengue music was promoted internationally by Dominican groups like Billo's Caracas Boys, Chapuseaux and Damiron "Los Reyes del Merengue," Joseito Mateo, and others. Radio, television, and international media popularized it further. Some well known merengue performers are Wilfrido Vargas, Johnny Ventura, singer-songwriter Los Hermanos Rosario, Juan Luis Guerra, Fernando Villalona, Eddy Herrera, Sergio Vargas, Toño Rosario, Milly Quezada, and Chichí Peralta.