The Extech 42570 Dual Laser Infrared Thermometer identifies the IR temperature where the dual laser converges into a single spot at approximately 50 inches from the target. Meter features fast 100 millisecond response times, Type K input, and a USB interface. Adjustable emissivity increases measurement accuracy for a variety of surfaces. Adjustable high/low set points with audible alarm alerts you when the temperature exceeds programmed set points. Featuring MAX/MIN/AVG/DIF measurements that displays the highest, lowest, average, and MAX minus MIN values.