Keeley Caverns Delay and Reverb Pedal Made in the USA Modulation Mode  Introduces pulsing modulation to the reverb to add musical inspiration and provide a different take on normal reverb effects Studio Plate Mode  Delivers studio-quality reverb with adjustable pre-delay reflections for the ultimate enhancement Shimmer Mode  Enables control over the reverb with an additional and prominent emphasis on octave-up voices for another unique creative twist