Two Measurement Modes: The infrared digital thermometer can measure HUMANS and OBJESTS: temperature 32 to 43 / 89.6 to 109.4 for humans, 0 to 99 / 32 to 210.2 for objects, accuracy is +/- 0.2C, measurement distance 3-5cm, reading temperature 0.1S, measurement deviation 0.4. 3 Colors Indicator: Yellow 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. 1S Non-Contact Measurement: Made with Advanced Infrared Temperature measurement technology, these thermometers will be measured without skin contact within 3cm and quickly measured within 1 second, which can offer you, as well than your family, more protection. Humanized Design: High-definition large-screen LCD, clearly displayed data 32-reading memory, records your temperature at any time. Small and light, ergonomic design, easy to carry. High Accuracy and Speed: Smart 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 according to your needs.