Temperature measuring range 32.0°C/90.0°F to 42.0°C/108.0°F. Display will show 'L' if temperature is below range or 'H' if above.
Accuracy is ± 0.1°C between 35.5°C to 42.0°C and ± 0.2°C for remainder of the range.
Operating ambient temperature is between 5°C - 35°C. Supplied with a 1.5V LR41 battery