In the words of MXR:

Go from crisp “bathroom” slap echoes to epic, Gilmouresque delays with
the MXR Carbon Copy Analog Delay. Featuring 600ms of delay time with
optional modulation, and a three-knob layout that controls Delay, Mix,
and Regen. In addition, there are two internal trim pots that offer
user-adjustable width and rate control of the modulation for even more
tonal options. All done by a completely analog audio path for authentic
rich, warm analog delaymade possible only by old-school analog bucket
brigade technology.