Form VH to Led Zep the Boss PH-1R pedal simply immerses you in the wide array of tones that it offers. With its speed, resonance, and depth controls this Boss phaser pedal lets you tweak the speed, depth of phase, and phasing intensity, respectively. This Boss guitar effect pedal leaves you stunned as it adds no noise to your signal and you can even place it before distortion. To meet the needs of the tough application that the Boss PH-1R goes through, its built is as tough as a tank. Play rock or your all-time-favorite metal and this Boss phaser pedal is an awesome companion for either. Providing outstanding sounds this Boss guitar effect pedal is a must for every guitar.