With the Rocktron Reaction Octaver effects pedal, it"s easy to dial in the perfect octave effects with Blend, High Filter, and Low Filter controls. It"s capable of anything from a gritty octave-down effect to quasi-ring modulator weirdness. True bypass. Fans loved Rocktron"s first round of stompboxes, but wanted them smaller so pedalboards could accommodate more. Rocktron delivers on that with the Reaction Series. With newly designed circuitry that boosts performance and tone, Reaction stomps are an affordable, compact solution for guitarists looking to enhance their tone.