Effect Type: Reverb · Technology: Digital · Mono / Stereo: Mono In, Mono Out · Controls: Reverb · Modes: 3 Hall Programs · Switches: Spring/Hall/Flerb · Bypass Mode: True bypass · Compact Digital Reverb Pedal with Three Algorithms · Three different reverb algorithms: Spring, Hall, and Flerb · Great for guitar, voice, and most any instrument · Digital reverb in a compact guitar effects pedal · Small, easy to daisy chain die-cast chassis · True Bypass · The Electro-Harmonix Holy Grail Nano is a pedalboard-space-saver with classic Holy Grail reverb sounds. The Electro-Harmonix Holy Grail Nano pedal provides divine digital reverb for us mere mortals. And the Electro-Harmonix Holy Grail Reverb brings the price down to earth, too. Contains 3 reverbs: spring, hall, and flerb. The Holy Grail pedal will make believers with its emulation of a classic spring reverb. The Nano Holy Grail hall reverb is lush and spacious as St Pauls. And the Holy Grail Reverb has a flerb reverb that's a haunting sound like no other. The Electro-Harmonics Holy Grail Nano reverb pedal provides the original classic spring reverb revered by guitarists for its authentic sound, a Hall reverb designed for gigging guitarists, and the completely original Flerb flanged reverb with unique and haunting spatial definition. The original Holy Grail was known for recreating quality reverb spaces and the Electro-Harmonix Holy Grail Nano pedal delivers the same definitive reverbs while saving pedalboard space.