The Coppersound Pedals Loma Prieta Gritty Harmonic Tremolo Pedal offers versatile and expressive performance with four waveshapes, Tap Tempo, and three onboard momentary effects. Easily switch between Harmonic Trem or traditional-style tremolo for a customizable sound. Plus, add some sweet-sounding dirt with the Grit control and synchronize with other devices using an external tap tempo controller. Professional tone and expert design make this pedal a must-have for any musician.