Altoids modular synth low pass filter

This is my new altoids modular low pass filter, it's the same filter I use on a lot of my instruments placed in a home all by it's self for use with any instrument you wish. It works well with my atari punk consoles, casio sk-1, any circuit bent device or even your guitar if you use a distortion pedal or some kind of preamp first in line. it has 1/4 inch in and out, power led, cut-off control knob and it runs on a single self-contained nine volt battery, (May be included)
here's a demo:

and another one: