Lee Custom's buffer booster. I'm selling it because I no longer have the opportunity to use it. It's a buffer with a vacuum tube, so it's great when the amps at studios or live houses don't sound quite right, or when you're aiming for a vacuum tube sound but the venue only has a transistor amp... I think this one effect pedal will not only improve the sound but also boost the player's motivation. It's small in size and has low noise, making it easy to use compared to other buffers in this category. Also, you can change the phase, which is great for sound clarity. The fact that you can change the phase, rather than it just changing, was very helpful. Regarding noise countermeasures, I think it's fine if you use a power supply with a stable voltage, but it's better to use an independent power supply. It seems that if you use a power supply with too high a voltage, the LED circuit may burn out and stop lighting up. The body gets quite hot, but that's the way it's designed. I've owned several, and they were all like that. There were no problems caused by it. The operation was fine. Please only purchase if you understand that it is a used item. The item for sale is the main unit only.