Selling to organize my overflowing collection of effect pedals. I purchased this used and have used it a few times indoors at home. Please check the photos for the exterior condition. I have confirmed that it is working perfectly before listing. In my personal opinion, it's a compressor that changes the sound, similar to the MXR Dyna Comp. This listing is for the pedal itself only. Please understand that this is a used item in the condition described above before considering a purchase. I will carefully package it to be waterproof and ship it within 24 hours whenever possible. No need to ask for permission to buy; immediate purchase is welcome, and priority will be given to those who purchase immediately.