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Their device is named S.H.A.R.T. I shit you not.
https://www.msn.com/en-us/health/wellness/farts-say-more-about-your-health-than-you-think-now-scientists-are-listening/ar-AA14Jova?ocid=msedgntp&cvid=c0c26a321c3645878b88050b202c5d28