The Kontact MIC is a lo-fi theme park.
It's a Eurorack microphone preamp with a piezo contact mic built into the panel.
The creative applications are endless: finger percussion/rubbing/scratching, guitar input, acoustic sources to CV, etc.
The PCB fibreglass has quite a nice rough texture - rubbing it with a finger or a plectrum creates quite a wide range of sounds.
The back of the panel is plated to expand the surface area of the contact mic.