This is my personal version of the famous Ugly face.
The principe of this effect is to pass the sound through a square oscillator. The pedal propose 5 control: the frequency of the oscillator, the threshold, the sensitivity for control how the input modulate the oscillator frequency, the blend control and the volume output.
This effect create a kind 8 bit sound.
The price is 70 euros and 90 with a lfo.