The GAMMA Series Eros Clean Chorus from Acoustic Control Corporation allows you to add bold or gentle modulation to your guitar sound palette. At low Depth settings, Eros adds subtle richness that’s perfect for thickening up a solo or adding character and bounce to a rhythm guitar tone. High Depth or Speed settings transform your guitar tone into a richly modulated wash of sound. The Eros Clean Chorus features a road-ready, classic, full-sized metal chassis with metal knobs, and operates from either a 9V battery, or 9V DC power supply. Batteries and DC power supply not included.