Review on Infrared Thermometer Forehead Accurate Function by Darrick Dobbin

This product has consistently measured 97.1 degrees from my forehead while my actual temperature is 98.6. I don't think the surface of your forehead is always the same as under your tongue. I have recalibrated the device using the information provided by the seller. allowed to re-translate. Hope this helps others. Disclaimer: Your device will no longer be accurate after it has been adjusted using your forehead as a means of calibration. How do I set up my device? 1. Place the inaccurate device for more than 1 hour at an ambient temperature of about 73.4-80.6°F.2. Put a certain amount of hot water and tap water into the container, and use an accurate thermometer to control the temperature of the water in the container until the temperature of the tap water and hot water reaches 98.6±0.1F. (I used my forehead) 3. Turn on the device and press the "MEM”, "CF”, "MEM”, "CF” and "MODE” buttons in sequence, at this time the device enters the calibration mode. Align the device's lens with the "warm water in the container" (I used the forehead) for about 3-5 seconds, then press and hold the trigger until you hear a "beep" (after the trigger beep) and then release the button.4. After calibration, use the forehead measurement trigger to ensure that the measurement result is approximately 98.6 degrees Fahrenheit.