A vocal band is a musical group that primarily focuses on singing without the use of traditional instruments. Members often use their voices to create harmonies, melodies, and rhythms, sometimes mimicking instruments through vocal techniques. This style of music can include genres like a cappella, where singers perform without any instrumental accompaniment. Vocal bands can vary in size and style, ranging from small ensembles to larger groups. They often perform covers of popular songs or original compositions, showcasing their vocal talents. Notable examples of vocal bands include Pentatonix and The Sing-Off contestants, who have gained popularity for their innovative arrangements and performances.