I had avoided this model since its release, thinking it was for beginners, but after hearing how great the G1 FOUR and other models were, and reading reviews praising the bypass sound, I decided to give the ME-20 a try. It turned out to be a very high-quality effects unit. In particular, the quality of the spatial effects like delay and tremolo is excellent, and I can understand why professional musicians would use them exclusively for spatial effects. The distortion effects, when combined with the EQ, are also, in my opinion, not inferior to analog or compact effects units. Guitar effects unit with a variety of effects. - Model Name: ME-20 - Brand: BOSS - Effect Type: Delay, Modulation, Reverb - Pedal Function: Wah Pedal - Controls: Knobs, Switches, Pedal - Connections: Input, Output, Headphones - Power: AC Adapter Thank you for viewing. Manufacturer: BOSS