This is the crazy effect heard on Jimmy Page's "Fool in the Rain" solo. The Blue Box Octave Fuzz takes your guitar signal and duplicates it two octaves down for a huge, subterranean tone. The Blend knob lets you control how much of the fuzz tone is mixed with the two octaves down signal. Not for the timid—there is truly nothing like the Blue Box. Power: Dunlop ECB003 AC Adapter or Single 9 volt battery The MXR Blue Box takes your guitar signal, fuzzes it up, then duplicates it 2 octaves down. You control the output and the mix between the dry signal and the effect. Using it 100% wet is quite an experience, but more recognizable sounds appear as you dial in more dry signal. The Blue Box is known for having a chaotic personality that can make each session a totally unique experience! Here are just some of the people who are using this box: John 5 - Rob Zombie; Mick Thompson - Slipknot; Munky - Korn; Jimmy Page; Tim Skold - Marilyn Manson; Jay Baumgardner - Producer Zakk Wylde; Geordie White - A Perfect Circle I bought this pedal new, it has two knobs, one for output volume and one for Blending the octave fuzz effect with your dry signal. It's super easy to get a sound out of, just crank the output and then you only have one knob to fiddle with, and that's all you need. The more you turn it clockwise the less of an octave effect you get yet you still have plenty of fuzz. The manual is there but not needed, pretty much says what I just did. In conclusion, whether you hate fiddling with knobs or are a tweak freak, this pedal is very easy and fun to use. Sound: I'm using a duel humbucker Epiphone SG with a Big Muff into a Fender 100FM head into a Marshall 4x12 cabinet. This pedal isn't noisy at all when you're not playing. The one complaint is that the pedal is not as loud as my others but it isn't a problem for me I put it before the big muff and it amplifies it with out affecting the sound to much seeing as they are both fuzzy anyways, it just makes it sound all the better to me. Besides that minor fix this pedal sounds absolutely awespme, when they say it shovels out enough low frequency to scare a blue whale they mean it. You can use it for deep Rhythm licks or have just a slight octave effect and use it to add color to your solos. It sounds stellar and I fell in love with it within 5 minutes. I personally don't listen to manya rtist's Who use a lower octave effect besides Jack White, but none the less a Blue orchid sound is possible with the help of my Big Muff which he also uses. This is a real psychedelic effect to use to make your own sound for your band or to just have for fun. Reliability & Durability: I've only had mine for two days so far however I played a Vintage '70s one at another guitar shop when I was looking at pedals and it's still kicking. And by the looks of it's metal construction it'll last quite awhile. As the book says you may be stomping on it 30 years from now. FEATURES • Power: Single 9 volt battery or Dunlop ECB-003 AC adapter • Controls: Footswitch toggles effect on/bypass (red LED indicates on) • Output knob sets total output gain