Hmph. This is a self-made effector from Handmade Pedal Works. I've used it for about six months, but it was only used at home, so I think it's a beautiful item with relatively little wear and tear. It works perfectly. The following is quoted from the original maker's description: ⭕️ Overview This is a distortion pedal made with reference to the circuit diagrams of the early to Black Face era Pro Co Rat (Proco Rat). (Self-made) ▶️ Uses valuable metal IC (can IC). Audio-grade electrolytic capacitors are used in the power supply section for noise reduction, but other components were selected to give the feel of the early models without using audio-grade components unnecessarily. As a result, I think it now produces the rough sound of the RAT. ⭕️ Customer Reviews ➡️ I have a Black Face RAT, and I thought it was quite a faithful reproduction. ➡️ It has more power than the current RAT and is easier to use because the case is smaller. ⭕️ Specifications ▶️ Center-negative 9V adapter (cannot use a battery) ▶️ Foot switch: True bypass specification with no sound quality degradation ▶️ Size: Approximately 60mm wide, 110mm long, 30mm high (excluding protrusions)