DigiTech Mosaic 12 String Effect DigiTech Mosaic The Mosaic is an effects pedal with a simple control layout that allows you to easily create the unique sound of a 12-string guitar to match your song. You can smoothly add a rich and brilliant 12-string sound to your song without having to switch guitars during a live performance. It can be used with electric guitars as well as electric-acoustic guitars, making it convenient. The true bypass design ensures that the guitar signal is not affected at all when the effect is off. [Main Features of the Mosaic] ■ Simple level and tone controls ■ True bypass ■ Compact design ■ Rugged steel chassis construction USED. Fully functional. The item includes the main unit only.