Multi-functional guitar, keyboard, and studio recording effects unit: the BOSS DE-200 Digital Delay. I have confirmed the delay effect. I have confirmed that the effect changes with each knob. There was no scratchiness in any of the knobs. There are scratches on the top and bottom. It is currently working, but due to the age of the equipment, it is sold as-is, with no returns. ○ Power Consumption: 9W ○ Dimensions: 482(W) x 44(H) x 240(D) mm ○ Weight: 3.5kg ○ Included: Power cord Thank you for viewing.