Dynamic Flanger Phaser Pedal with Random Stepped Filter; DynaFlange, DynaMoPhase and Random Filter effectsClassic experimental and progressive sounds of the pastSimple, easy to use control layoutRate, Sensitivity, Depth and Level controlsFilter, Phase and Flange toggle switch; Pedal Type Dynamic Flange plus Phaser; The Keeley Bubble Tron Dynamic Flanger Phaser and Random Synth Filter has three modes of operation