 The group's songs combine elements of rock, bluegrass, and old-time music, prominently featuring the male-female vocal harmonies of lead vocalists Patrick Sullivan and Rachel Cox.Rather than imitating the style of commercial country or bluegrass, the group's melodies more closely recall old American folk songs and ballads, though often supported by a driving rock beat.In addition to the typical guitars, bass guitar, and drums, the group also features an electrified violin, an electric guitar tuned like a five-string banjo, and a lap steel guitar.