The infrared thermometer provides a quick and accurate non-invasive measurement. The tapered probe design and under 2 second measurement make it easy to use with babies and children. Calibrated Accuracy Limits Ambient Temperature Target Temperature Accuracy: 16°C to 33°C ± 0.3°C 33°C to 42°C ± 0.3°C (60.8°F to 91.4°F) (± 0.5°F) (91.4°F to 107.6°F) (± 0.5°F) Calibrated Accuracy Limits (after Recalibration*) Ambient Temperature Target Temperature Accuracy: 16°C to 33°C ± 0.3°C 33°C to 42°C ± 0.3°C (60.8°F to 91.4°F) (± 0.5°F) (91.4°F to 107.6°F) (± 0.5°F) *Post recalibration accuracy using the Genius Checker/Calibrator may not necessarily be equivalent to factory calibration. Displayed Temperature Measurement Range Temperature Range depends on Site Mode as follows: Ear 33.0°C to 42.0°C (91.4°F to 107.6°F) Oral 33.0°C to 41.9°C (91.4°F to 107.4°F) Rectal 33.6°C to 42.0°C (92.4°F to 107.6°F) Ambient Temperature Range 16°C to 33°C (60.8°F to 91.4°F) 15% to 90% RH non condensing