This is a 2-channel overdrive pedal, highly regarded as a top-of-the-line Dumble-style pedal. It recreates the Dumbles of Robben Ford and Sonny Landreth. It's an overdrive with rich harmonics and excellent note separation. It has been used, so there may be some scratches and dirt. Velcro is attached to the back. Box and instruction manual are included. *Since it has been used, it is not recommended for those seeking a new-like condition. From the manufacturer: The new "GLADIO" from the authentic Italian brand "Cornerstone". CH1 provides a smooth and creamy sound inspired by Robben Ford's sound. It is very clear and responds delicately to touch. CH2 provides a slightly fuzzy and hard drive sound inspired by the sound of slide guitar master Sonny Landreth. The center toggle switch allows you to select two different switching modes. In "S" single mode, only one channel can be used at a time. When you press the footswitch of one of the two channels, the other channel turns off. In "D" double mode, you can turn each channel on and off, and use the two channels simultaneously. The feeling of compression, saturation, and delicate touch response realistically reproduces the feeling of a vacuum tube. You can switch between two different sounds or combine them at the same time to enjoy a wide range of sounds.