Precision and reliability: The frontal thermometer adopts the latest sensor technology and has been tested and approved clinically for its accuracy and reliability.It is very easy to use: using this non-contact thermometer, simply press The trigger button will immediately provide accurate information. Contactless end temperature from 1 to 5 cm: the measurement distance of the body temperature must be 1 to 5 cm, which is Very safe, more hygienic and non-contact Product name: Contactless infrared front thermometer Temperature range: 34C-42.9 Power supply: DV3V (2 AAA batteries), Delivery does not include the batteries Working Conditions: + 16 C ~ + 35 C (60.8 F ~ 95 F) Display unit: Celsius ( C) Fahrenheit ( F) Size: 155x102x 45 mm Precautions: 1. When measuring the temperature, it is preferable that the ambient temperature is between 16 C and 35 C, which is less than or greater than the precision of the test of the color ring. 2. Patients with fever wishing to apply cold compresses on their heads, sweat and take other depressive measures will make the measurement results low. Avoid testing in this case. 3. The surrounding environment of the tested person must be stable and can not be measured instead of the air circulation such as the air conditioner fan and air outlet. 4. Do not use the instrument outside or in highly exposed locations in the sun. 5. At the extent, it is recommended to measure about 3 times each time, depending on the most displayed data set.