Multifunctional: 1 second temperature measurement. Contactless-The thermometer measures the temperature by inhaling the infrared heat emitted by the human body. Convenient to Measure-Align the thermometer probe in the middle of the forehead and maintain a vertical distance of about 3-5 cm. Press it lightly, and the measurement value will be announced with a beep after about 1 second. Fast and accurate. LCD back-lit display ,available for users in the dark enviroment ,read the data easily. Measurements for home use: Body temperature measurement, and object temperature measurement. Specification: Operating Temperature: 16-45 Effective Distance: 3-5cm Body Measurement Range: 32-42 35.6temperature 37.2,showing Green Light 37.3temperature 37.9,showing Orange Light Temperature 38 ,showing Red Backlight Accuracy: 0.1 Size: Approx. 15x8.5cm / 5.90x3.34inch Package Includes: 1 Piece Infrared Non-Contact Thermometers 1 Piece Manual(35 Pack) Note: Body Temperature Mode Tips: 1.When the measurement object comes from a place with a large temperature difference from the measurement environment,it should stay in the test environment for at least five minutes. Object Temperature Measurement Tips: 1.Object Measurement Range: 0-100 2. When the measured value is lower than 0,it will light red for 3s and display "LO". 3.When the ambient temperature is higher than 100,the backlight will be bright red for 3s and "Hi" will be displayed. 4.When the ambient temperature is lower than 16 or higher than 35 ,Erro is displayed.Red backlight for 3 seconds.measurements are not allowed or measurement accuracy is diffcult to guarantee. 5. If the data is incorrectly read or written ,or the calibration is not completed ,"ErC" is displayed. Red backlight for 3 seconds.