I have the opportunity to test the ThermoFlash because I caught the flu. Feeling feverish I take my temperature me on the temple and then, surprise ThermoFlash shows Lo (too low), I retry 3 times, always identical Lo I take a conventional thermometer and 38.5 result. I start in the morning several times: 36.3 - 36.5 - 36.2 37.9 reality. I highly recommend. In outdoor temperature test, also unreliable. PRODUCT TO AVOID.