This screen means this measurement is invalid.
Possible reasons for measurement errors include:
- Measurement distance is greater than 1.18in (3cm).
Caution, do not keep the button pressed while approaching the thermometer from a distance of less than 3 cm. Place the thermometer at a distance from the forehead of less than 3 cm THEN press the button.
- Environment temperature does not meet measurement requirements or there is an excessively high-temperature difference.
- Target temperature exceeds the measurement range.