For a long time, many musicians have had dream of an instrument that would combine the advantages of both a fretted and a fretless instrument. This instrument would increase in the capabilities of the performer. Although prototypes have existed, not a single company has put such an instrument on the market.

Today musicians have the opportunity to use such an instrument. The advantages of this instrument are obvious. It allows for instant change of mode, from fretted to fretless and back again. It allows the combination of different styles and techniques of performing in one musical piece, including live performances. The need to transport two instruments is eliminated; this is especially important when touring.