The Denio Metal Rocker is a guitar effects pedal designed for metal and hard rock guitarists. It is made of durable metal construction and has true bypass switching for improved signal integrity. The pedal offers a wide range of distorted tones, ranging from heavy crunch to all-out saturation. It features three control knobs for adjusting the level, tone, and gain of the distortion, as well as a footswitch for activating the effect. The pedal runs on a 9V DC power supply or a 9V battery, and it can be used with any electric guitar and amplifier setup.