Radio is the debut studio album by American rapper LL Cool J, released November 18, 1985 on Def Jam Recordings in the United States. It serves as the label's first full-length album release. Recording sessions for the album took place during 1984 to 1985 at Chung King House of Metal in New York City. The album was primarily produced by Rick Rubin, who provided a sparse and minimal production style. Radio also features a sound that is punctuated by DJ scratching, mostly brief samples, and emphasis of the downbeat. LL Cool J's b-boy lyricism conveys themes of inner city culture, teenage promiscuity, and braggadocio raps.