The mandocello is a stringed musical instrument that belongs to the mandolin family. It is larger than a mandolin and tuned an octave lower, typically in the same pitch as a cello. The instrument has four courses of strings, usually made of metal, and is played with a plectrum. Mandocellos are often used in folk, classical, and bluegrass music, providing a rich, deep sound. They can be played solo or as part of an ensemble, complementing other instruments like the mandolin and guitar. The mandocello's unique tone adds depth to various musical styles.