Rocker Box is an optical tremolo pedal that gives you the tools to unearth rich natural sounding tremolo effects. A Bias control adjusts the tonal complexion of the sound wave offering everything from smooth and polished tremolo to the looser non-symmetrical waveforms of vintage tube amps. Depth and Speed controls give you the ability to further fine-tune the effect. Featuring True Bypass switching Rocker Box offers a versatile array of tremolo sounds in a pocket-sized pedal.