This is a circuit board for a clone of the Ibanez Sound Tank BN-5 distortion pedal, known as Black Noise. It's a highly underrated gem of a distortion pedal.
Includes daughterboard for a 3PDT foot switch. This is not likely to be an ongoing product. These are extra boards from a small pedal run.
You can buy a pre-built pedal here if you'd prefer.
Documentation is here: https://mas-effects.com/files/black-noise-instructions.pdf