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There is a "Venus Optics" (Laowa) known for high-end lenses, but if this is an audio device (like a guitar pedal or synth module), a "Disgruntler" would typically refer to a distortion or fuzz effect unit designed to "break up" a clean signal. Gaming or Collective Fiction:

If this is a specific item you are looking for, it may fall into one of these categories: Niche Hobbyist Hardware: A custom-modified version of the Vialux V9501 venuss club v9501 disgruntler