Technical specifications Temperature units: C / F, switchable Power source: DC 3V, AAAX2 Battery: 2 * AAANot included in the package Weight &Dimension: 145g, 149x95x45mm About this item Non-contact and quick measurement: Forehead thermometer can measure temperature in 1 second without physical contact. The infrared thermometer adopts one-button measurement design, which is quick and convenient. 2 in 1 Mode: The Professional Forehead Thermometer includes forehead and surface modes. Besides measuring human body temperature, we can also measure ambient temperature, water temperature or object. Multi-functional adult thermometer can meet your different needs. Audible and visual fever warning: The infrared thermometer has an audible alarm, you can set the temperature alarm value. Forehead medical thermometer uses three-color backlight design. In body mode, the forehead thermometer is able to judge whether a fever or not by different backlight color: Green(32.0-37.4), Orange(37.5-37.9), Red(38 ,0- 43.0 ) Professional and Accurate: The infrared thermometer uses infrared technology to quickly and accurately measure data. You can switch between Celsius/Fahrenheit modes as needed. The accuracy of the forehead thermometer is 0.2C / 0.3F. Memory Function and Auto Power Off: adult thermometer has memory function and can store 99 sets of temperature data(for forehead mode), which can help you record better. The infrared thermometer will automatically turn off after 15 seconds of inactivity, saving energy.