These are cheap inaccurate thermometers for retail and not professional clinics and hospitals. Here are the typical reviews for this junk. https://www.amazon.com/TempIR-Body-Temperature-Thermometer-Thermometers/product-reviews/B00CKL70LO/ref=cm_cr_dp_qt_hist_one?ie=UTF8&filterByStar=one_star&reviewerType=avp_only_reviews&showViewpoints=0