To turn the thermometer on, push the «start» button.
During an internal self-check, the display shows all segments.  
Temperature can be taken only if lens filter is mounted on the probe.
The thermometer is ready to use after two beeps are sounded and the non-flashing ear icon appears.  
Fit the probe snugly into the ear canal, then push the «start» button.
One beep signals normal temperature. 
Audio fever indicator will trigger 2 consecutive beeps when the reading is equal or higher to 37.5 °C (99.5 °F) and 4 beeps if the reading is equal or higher to 38.6 °C (101.5 °F). The result is shown on the display (7).