Transform the tone of a guitar or a keyboard using the Electro-Harmonix B9 Modulation Pedal. Designed to produce great sound modulations, this pedal comes equipped with various convenient controls such as Organ Volume, Dry Volume, Mod, Click, and Bypass. Take control of these buttons and produce the desired sound effect. The Electro-Harmonix B9 Modulation guitar effect pedal features 1/4" Jack input connector, 1/4" Jack output connector and uses DC Adapter power supply for its operations.