I wanted to create a circuit that combined the powerful, singing, dynamic midrange of a germanium fuzz pedal with the gritty, thick, and well-balanced muff-style fuzz distortion. Using silicon transistors in a unique architecture, giving you the best of both worlds, Eureka! is a phenomenal team player, performing flawlessly with a wide range of effects, guitars and amplifiers whilst always maintaining an eye-catching and distinctive personality. The onboard 3-way toggle switch allows you to gradually increase the bass. This is extremely useful for switching between single-coil and humbucking guitars, or for adding volume during solos. With a strong enough signal, this setting delivers the characteristic gated fuzz response.Condition: No problems with use Power supply: 9V center negative Accessories: Box, instruction manual (English) Warranty: 3 months