Electro Harmonix Bass Mono Synth - UsedThe Electro Harmonix Bass Mono Synth packs eleven synthesizer effects into a compact pedal. With a flick of a switch, you can easily roll through a wide spectrum of synthesized sounds with intuitive and easily adjusted controls. Add in an expression pedal for extra interaction and see the cool synthesized places this pedal can take you. This Bass Mono Synth is in very good condition and is fully functional.