The Extech IR400 Mini Infrared (IR) Thermometer with Built-In Laser Pointer, -4 to 630°F, 8:1 is a compact thermometer capable of measurements up to 630-Degrees F (332-Degrees C) with the built-in laser pointer that identifies target area and improves aim. Backlighting illuminates its display for taking measurements at night or in areas with low background light levels. It has a fixed 0.95 emissivity that covers 90-percent of surface applications.