Keeley Hydra Reverb and TremoloThe HYDRA is a high fidelity and true stereo Reverb and Tremolo. Designed to be the perfect end to ANY pedalboard, regardless of genre. Save up to 3 presets and dive deep into the HYDRAs potential using our Alt Control feature. The Hydra features on board or remote tap tempo, you can swap the order of the Tremolo and Reverb, expression pedal control, Infinite Hold Reverb trails and so much more! Type: Stereo high fidelity reverb and tremolo