MIB neuralizer - Men In Black

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The Neuralyzer is a high-tech device used by the Men in Black to erase memories. This gadget, measuring about the length of an average cigar tube, emits a bright flash that instantly deletes recollections of the past, ranging from hours to years, depending on the user's settings. The Neuralyzer made its debut in the first comic book series and has since become a standard issue tool for Men in Black agents, appearing in all three movies and the animated TV show.