For years the Holy Grail pedal has been the musician's choice for reverb. The Holy Grail Plus Pedal from Electro-Harmonix adds room reverb and a multifunction decay/damping/modulation speed control. The Grail just got even more divine.
Controls: Blend, Amount, and Reverb Type (Hall, Room, Spring)
1/4" input and output
DC power input for battery replacement.
LED indicates whether effect is engaged or bypassed.