This is a resonant bandpass filter and frequency booster that offers controls for Mix, Level, and Frequency. You can achieve everything from a clean, unaltered signal to a full frequency enhancement. Blending in some clean signal provides clarity for chords. When the mix is at maximum, it creates a pronounced peaking effect reminiscent of a powerful wah or filter sound. It's perfect for use before a fuzz pedal for either a strong or subtle wah-like effect, or for enhancing midrange and treble when connected to an amp or another pedal. The toggle switch lets you choose between two modes: a full mode and a thinner mode, which fine-tunes the level of peaked frequency. When playing chords, you can capture those unique small amp and hollow "honk" tones.