If you think that there's no such hardware just because you failed to find any, leave the question unanswered.
But if you know that such hardware can't exist, for example because you know that similar hardware is significantly more expensive, or that the requirements would violate the laws of physics, or you're an expert in this kind of hardware and you know that nothing meets the requirements, then do write an answer explaining why the requirements cannot be met, and ideally providing alternatives that come as close as possible to meeting the requirements, keeping in mind the intended purpose.
Similar discussion on Software Recommendations: Impossible/impractical requests?Impossible/impractical requests?
