This is a multi-effects unit that combines a variety of effects into a single device. Despite its compact size, it includes a wide range of effects such as delay, reverb, and modulation, and allows for instant recall of presets. It's perfect for guitarists who want to easily switch between different tones. I was using this until recently, and I've performed a basic operational check. Knowledge is required for use and installation. No claims and no returns accepted. Please refer to the photos for the product's condition. This is a used item, so please refrain from bidding if you are extremely sensitive to condition or are looking for a new-like condition. Shipping will be within 2-4 days after bidding. Management number: 56