I recently purchased this on Mercari. I believe the rubber part for the pin is missing. There is no crackling or noise. I am selling this because I purchased an amp that can apply effects through an app. Please understand that this is a used item, and only purchase if you are okay with that. The Digital Delay DD-3 is a silver effects pedal with four control knobs and two jacks. - Model Name: DD-3 - Type: Digital Delay - Color: Silver - Number of Control Knobs: 4 - Input/Output Terminals: 2 jacks - Pedal Type: Footswitch Thank you for viewing.