Mad Professor Deep Blue Delay Effects Pedal w/ Power Supply Level: Sets the level of delayed signal mixed with straight guitar tone, fully CCW there is only straight (un-effected) guitar signal heard and fully CW gives the loudest delay. Delay: Controls the delay time from 25ms (fully CCW) to 450ms (fully CW) Repeat: Controls the repeats of the delay signal, fully CCW gives one repeat and at fully CW you get infinite feedback