Are you looking for Metene Thermometer Instructions - Celsius to Fahrenheit Switch ?   1. Press the button “Ear” and hold for 8 to 12 seconds till the screen changes from —℃ to —F.2. Press the Ear buttons once again.3. After a few seconds, the thermometer will turn off.4. The Metene Thermometer is now in Fahrenheit temperature measurement mode.   About Metene Thermometer ...