Display the body temperature of the measured object by measuring the heat radiation of the forehead. Maximum allowable error: Within the forehead range of 32.0 - 42.9 (89.6 - 109.2); With the Surface of Objects range of: 0 - 100 (32.0 - 212.0). This product is composed of high-precision infrared sensor,It can quickly and accurately measure human body temperature or object temperature. Multifunction thermometer : Human Body /Water/Food/milk/ bedroom temperature measurement etc. Usage rules -- Human Body Measurement:While waiting, point the thermometer probe at the center of the forehead (above the eyebrow center) and keep it vertical, distance 1 - 5cm, press the measurement key to display the measured temperature within about 1 second; Working Principle: This product adopts infrared temperature sensing method to measure temperature display or data output. It displays the temperature of the measured object by measuring the thermal radiation of the forehead or object. Feature: 1. LCD backlight display; 2. Automatic alarm; 3. Infrared Non-contact, 4. One Second for Measurement, 5. Dual temperature mode 6. Momery Function 7. Intelligent Shut Down. Specification: Material: Electronic component Battery: 2*AAA Batteries(Not Shipped) Color: White Measurement Accurate: 0.2 (0.4) Size: approx. 36x42x154mm/1.41x1.65x6.06inch. Forehead Measures: 32.0-42.9 89.6-109.2 Objects Measures: 0-100(32.0-212.0) Resolution:0.1 Maximum allowable error: 35.0/95 to 42.0/107.6, 0.2/0.4 (32 /32.72) Outside the range of 35.0/95 to 42.0/107.6, 0.3/0.5 (32.54 /32.9) Ambient temperature: 10 - 40 / 50 - 104 Relative humidity: 15%-85% Atmospheric pressure:70kPa-106kPa Antomatic Shutdown: 8s Package Includes:(3 Pack) 1 Piece Infrared Thermometer