Ernie Ball MONO VOLUME PEDAL 250K P06166 Power is on without any issues, and there is no scratchiness. Currently, this is a high-end volume pedal that costs over 20,000 yen new on Amazon. There are 5 current models of similar types, and their roles differ depending on the application. https://www.ernie-ball.jp/guitar-accessories/pedals/volume-pedals Ernie Ball Volume Pedal