Featuring a streamlined design of only volume and fuzz knobs, a compact design and an internal rechargeable lithium ion battery, the Red Witch Seven Sisters Ruby Fuzz is a space- and power-saving pedal with a big presence. Capable of working on a standard 9V or operating independently on the internal battery, the Ruby is capable of adding everything from a vintage germanium-esque fuzzy edge to a silicon-like buzz bordering on distortion.