Possibly the best all around reverb pedal ever made. This Holy Grail is the big box version. While the logo is scratched up quite a bit, It is in structurally excellent condition and works perfectly. There are three settings- spring, hall and flerb. each setting can be set from barely there to completely drenched, and anywhere in between. The spring setting at 12:00 is ideal for most reverb fanatics. Hall is quite a bit more dramatic than the spring setting, and flerb is a combination of flange and reverb. Power supply included.