"The King of Rock 'n' Roll: The Complete 50s Masters by Elvis Presley is a cassette box set released in 1992 by RCA Records. Featuring artists such as Floyd Cramer, Chet Atkins, and Carl Perkins, this collection showcases the best of 50s rock 'n' roll. With a runtime of 41 minutes, this nostalgic compilation is a must-have for fans of pop, general, rock 'n' roll, and oldies music from the era."