http://proguitarshop.com/keeley-electronics-silver-bullet-cv7003.html This is the Keeley Silver Bullet CV7003 Fuzz, a limited edition pedal built in the esteemed tradition of the finest vintage British fuzzes of yesteryear. At the heart of the Silver Bullet's remarkable sound is the rare military-spec CV7003 germanium transistor. Robert Keeley reached into his secret stash of Germanium transistors to create both the Black Glass fuzz and Silver Bullet which means this is a very limited run of pedals that will not be available again. Matching with the CV7003 is a duo of silicon transistors for a fat, spongy tone reminiscent of the finest Tone Benders. The Silver Bullet's tone knob functions more like voice control, perfect for matching the pedal's character to your guitar's pickups. Unlike a lot of old-school germanium-based fuzzes, the Keeley Silver Bullet operates on standard 9volt, center-negative power, letting you integrate it easily into any pedalboard. It also features rugged true bypass switching, and like all of Keeley's premium products, the Silver Bullet is made by hand in Oklahoma, USA.