For those seeking a classic analog delay sound, the carbon copy is a great choice! It features a Mix knob so you can adjust how much of the effect you want. A Regen knob which allows you to control the number of repeats, and a Delay knob which adjusts the delay time, allowing for long delay sounds or a quick slap back setting and everything in between. The Carbon Copy also has a mod button in case you want to add a little but more movement to the effect. This pedal comes with the original box.