Possibly the best auto wah around. Instantly "funkifies" your sound especially when applied to sustained notes and chords. Incorporated into even the simplest rhythms and lead lines the Auto Q can create dramatic, counter-rhythmical textural effects. Volume, decay, "Q," and range controls provide for super-precision attenuation to accentuate even the subtlest nuances. Indestructible black metal housing. Controls and pointer knobs glow in the dark. DC 9V battery, AC wall adapter (ECB-003), or Dunlop DC power brick.