In the words of Electro-Harmonix:

A faithful reproduction of the highly coveted 1973

Violet Rams Head Big Muff heard on countless classic recordings and

famous guitar solos. It delivers the unmistakable articulate string

separation and exceptional sustain thats made the V2 Big Muff so sought

after. Now with a few choice updates for convenience including true

bypass switching, an LED to indicate effect status and the option of

being powered by a 9-volt AC adapter.