Electro-Harmonix Worm XO Analog Wah Phaser Vibrato Tremolo
Modulation madness! All-analog multi-effects processor featuring  Phaser, Tremolo, Vibrato, and a Neo-modulated Wah. At the heart of  It's the popular worm in a new die-cast housing. The Worm is a specially designed tone-bending engine that creates  groundbreaking oscillatory effects.