ValuesRus Infrared Thermometer, is Hospital Grade and has a Programmable Calibration Feature, Because it has an Electromagnetic shield there is no EMC signature emitting from this device and is safe for hospital use. FDA Approved. and tested to be accurate to within 0.1°C/F. The user range is 2”– 6” most others infrared Thermometer range is less than 2”. There are two modes Body use and Home use. When in body mode, It can be and should be calibrated for darker skin. again perfect for hospital use. This calibration feature is used to calibrate the reading to match your color of skin. The home use is good for checking baby's milk / Bath water / food and more.