The Carl Martin Chorus xII has two identical but independent sets of speed and depth controls. Each chorus has an LED indicator that lights up when in use and also flashes an indication of the speed setting. The Chorus xII has a stereo output via two quarter inch jacks. The on switch allows you to engage or bypass the chorus. The select switch allows you to switch between the two chorus settings mid song or mid set without having to get down on your knees alter the controls. The Carl Martin Chorus xII is the perfect choice for guitar, bass or keyboards. It is unbelievably rich in sound, totally quiet, and most important of all, does not change the basic sound. The Chorus xII has a built in, regulated (+-12V) power supply which enables us to design circuitry of the highest quality with maximum headroom.Get your Carl Martin Chorus xII Dual Stereo Chorus Guitar Effect Pedal today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.