Welcome to the lush warm chorusing of the DLS Chorus Waves! Experience the versatility of thick to transparent chorusing and everything in between. There are 2 output choices; OUTA is more organic sounding, while OUTB is mildly brighter sounding. Use either output for mono, or both for a complimentary beautiful lush stereo sound. The Width control dials in a variety of chorus sounds from spacious 3D sounds, to compressed thickening chorus. Crank up the Depth to get deep chorus or pitch bending Vibrato, or increase the Rate for a hint of Rotary Speaker swirl. The Blend pot mixes in as much analog instrument with lush Chorus Waves as desired. Although a transformer is included, a worry free 9VDC input can accept and polarity from a pedal board supply! Smaller can be better - measuring at only 5L x 4W x 2.5H. This effect is true bypass, constructed using a heavy steel enclosure, steel switches, and steel pots to withstand every road environment. DLS products are all custom crafted in the USA! So why the name Chorus Waves? Chorus waves are electromagnetic wave emissions generated by electrons around the Earth's radiation belt, generating quasi-musical sounds. Sounds are created by geomagnetic storms which are responsible for auroras. DLS Chorus waves are out of this world!