I recently purchased this on Mercari. No crackling or noise. I am selling it because I urgently bought an amp that can apply effects via an app. Please only purchase if you understand that this is a used item. Guitar effector that provides a variety of sounds. - Model Name: Blues Driver BD-2 - Color: Blue - Output Terminals: OUTPUT - Input Terminals: INPUT - Adjustment Knobs: LEVEL, GAIN, TONE Thank you for looking.