BETTER ACCURACY: The distance to spot ratio is 12: 1; Measure surface temperature ranging from -58°F -1022°F / -50°C - 550°C; With higher precision ≥100°C2% / ≤100°C2°C, meaning the Laser grip 1022 assure greater accuracy; Response time: ≤500Ms ADJUSTABLE EMISSIVITY: Emissivity is the measure of an object's ability to emit infrared energy. Emitted energy indicates the temperature of the object. Adjustable emissivity improves measurement accuracy across different surface types, just regulate the emissivity of your 1022 according to the instruction（0. 1-1. 0） MULTIFUNCTION: 1022 features with maximum measure function; The LCD screen is back-light, it also has an auto-off function and a low battery indicator to extend the battery life so you never accidentally run out of juice (battery included) VERSATILE DESIGN: Infrared Technology makes this thermometer handy to measure the surface temperature of various objects especially temperatures above boiling points and below freezing points; Use it when you are cooking and barbequing, performing auto maintenance, doing home repairs, and a host of other tasks NOTE: For best accuracy, the distance between the thermometer and object of measurement should approximately be 14. 17 inches (36cm); Temperature readings from this devices are inanimate objects, the measured temperature for humans or animals will not be correct; FDA, FCC, CE compliant; Class 2 laser, optical power 0. 5-0. 9mW This product is an industrial thermometer which should be not intended for medial usage.