Kinsa takes accuracy very seriously. Typically in “Normal Mode” our Kinsa Smart Stick thermometer takes FDA-cleared accurate oral readings in 10 seconds or less using a predictive algorithm. “Long Reading Mode” (also referred to as Direct Mode) is an alternate way of taking a reading, by measuring body temperature over a longer period of time. In this mode it takes several minutes for the reading to complete, and this may not be practical for infants or fussy toddlers! Contact our Customer Happiness team at www.kinsahealth.com/help if you have further questions.