BOSS TR-2 Tremolo effect pedal with RATE and DEPTH controls. - Model: TR-2 - Brand: BOSS - Type: Tremolo effect pedal - Control Knobs: RATE, DEPTH - Power: 9V dry cell battery or AC adapter - Input/Output Terminals: INPUT, OUTPUT Thank you for viewing. I purchased this used about six months ago and have only used it a few times in live performances. Operation has been confirmed. There is no scratchiness, and it works without any problems. The accessories are all that are shown in the photos. I think it's a good pedal that's easy to use intuitively. There are almost no scratches or stains. I am selling it to fund the purchase of new equipment. *Please understand that this is a used item that has been stored by a private individual. Type... Electric guitar effector Manufacturer... BOSS