Etekcity Lasergrip 774 Thermometer guns have been used by major airports and security offices during the 2014 Ebola outbreak. The Infrared lens inside the Lasergrip 774 Thermometer provides temperature readings without the need to touch or come close to anything dangerously hot or cold. You'll be able to effortlessly measure high temperatures, hazardous and inaccessible objects, and even moving targets; such as hot engine parts, cooking surfaces, swimming pools, bath water, wine coolers, hot asphalt, electric bearings, and much more.The measuring surface is about 2cm below the infrared aiming point. For best accuracy, the distance between the thermometer and object of measurement shold approximately be 14.17inches (36cm).