Accuracy and Reliability: The forehead thermometer adopts the latest sensor technology and has been clinically tested and approved for its accuracy and reliability. It is very easy to use: using this non-contact thermometer, just press the trigger button, it will immediately provide you with accurate information. 1-5cm Non-contact Forehead Temperature: The body temperature measurement distance should be 1-5cm, which is very safe, more hygienic and non-contact Product Name: Non-contact infrared forehead thermometer Temperature range: 34C-42.9 Power supply: DV3V (2 AAA batteries), delivery does not include batteries Working conditions: +16C~+35C (60.8F~95F) Display unit: Celsius (C) Fahrenheit (F) Size: 155X102X 45MM Precautions: 1. When measuring temperature, it is best if the ambient temperature is between 16C and 35C, which is lower or higher than the accuracy of the color ring test. 2. Patients with fever who wish to apply cold compresses to their heads, sweat, and take other depressant measures will make the measurement results low. Avoid testing in this case. 3. The surrounding environment of the person being tested must be stable and cannot be measured instead of the air circulation circle such as the fan and air conditioner air outlet. 4. Do not use the instrument outdoors or in places with strong sunlight. 5. When measuring, it is recommended to measure about 3 times each time, depending on the most displayed data set.