The Electro-Harmonix Holy Grail Nano Reverb Guitar Effects Pedal has the prized sounds of the legendary Holy Grail reverb pedal in a rugged, performance-friendly nano die-cast chassis. The small footprint stompbox fits easily into any pedal board while still delivering the amazing reverb sounds that made the original 2002 Holy Grail a legend among guitarists everywhere. The EH Holy Grail Nano reverb pedal provides the original classic Spring reverb revered by guitarists for its authentic sound.Reverb AlgorithmsThis compact guitar pedal contains three different reverb algorithms - Spring, Hall, and Flerb. All three algorithms were designed and tailored for the electric guitar but they will work equally as well on most instruments and voices. The Spring algorithm is a recreation of the classic spring reverbs that are found in many guitar amplifiers. The Hall algorithm is a new, lush reverb. Finally, Flerb is a beautiful reverb like nothing you have heard before and may help you play your instruments in new ways.Convenient DesignConnect your instrument into the input jack and your amp into the output jack. Plug the DC adapter into the 96DC-200mA jack and then plug the DC adapter into a wall outlet. The status LED indicates when the effect is switched on. The footswitch engages and disengages the Reverb effect.