Two Measurement ModesInfrared digital thermometer can measure HUMANS and OBJESTS: temperature 32-43/89.6-109.4 for humans, 0-99/32 to 210.2 for objects, accuracy is +/- 0.2, measuring distance 3-5cm, reading temperature 0.1S, measuring deviation 0.4. 3 Colors IndicatorYellow Backlight: 37.5C -38.4C (Slight Fever), Green Backlight: 32.0C -37.4C (Normal), Red Backlight: 38.5C -43.0C (High Fever). Fever warning: when the measured temperature > 38.5 degrees, the thermometer alarm will sound 6 times. Humanized DesignHigh-definition large-screen LCD, clearly displayed data 32-reading memory, record your temperature at any time. Small and lightweight, ergonomic design, easy to carry. 1S Non-Contact MeasurementMade with Advanced Infrared Temperature measurement technology, these thermometers will be measured without skin contact within 3cm and will be quickly measured in less than 1 second, which can provide you and your family with more protection High Accuracy and SpeedSmart probe with anti-glare design, microchip sensor , fast and accurate measurement of body temperature. You can change the configuration settings by converting between Celsius and Fahrenheit as needed.