This thermometer is specially designed for measurements on children - must after switching between ages 3 months, 3-36 months and older than 36 months can be chosen. Effect of selection is that the beeps are sent for "Fever" from another limit temperature. Of course you could also inform themselves which body temperature is normal in babies. The second feature is more important. The measurement is very fast, even under the armpit in less than 10 seconds. The process is not exactly disclosed; but the time is too short to allow the thermometer tip almost body temperature could have reached. I'm more likely to assume that the rate of temperature rise of conclusions can be drawn. The deviation of the measured values of a normal, ie slow thermometer was up to 0.5 degrees, and in both directions. In the trend the measured values under the armpit seem a little too low, the measured values in the mouth rather too high. Conclusion: the thermometer provides a way (or impatient adults) to spare children a minute-long measurement, at the expense of a little accuracy.