Warr Guitar
The Warr Guitar is an American-made touch guitar, a type of instrument that combines both bass and melodic strings on a single fretboard. Invented by Mark Warr, a musician from Thousand [Oaks, California], it is related to the Chapman Stick, another two-handed tapping instrument. The Warr guitar is designed for either two-handed tapping or strumming. Warr guitars have between seven and 14 strings.
Well-known Warr guitar players include Trey Gunn and Colin Marston.