This is an early "Big Box" Holy Grail, made in the USA, known for being used by John Frusciante. It features a deep, analog-like, warm reverb that is not found in current models. With this one unit, you can create a unique atmosphere, from legendary spring reverb to the fantastical "Flerb" sound. It can be operated intuitively with a single knob. ● Condition • Operation: All modes (Spring/Hall/Flerb) function properly. • Appearance: There are scratches and minor imperfections commensurate with age, but there is no significant damage, and it is in good condition as a vintage item. Please refer to the photos. • Power: Since batteries cannot be used, we recommend using an adapter. ● Contents • Main unit only For guitarists who will cherish it, please consider purchasing. #ElectroHarmonix #EHX #HolyGrail #JohnFrusciante #Reverb #EffectsPedal #MadeInUSA