THERMOMETER The non-contact Extech 42545 infrared thermometer is equipped with a backlit illuminated display for taking measurements at night or in areas with low background light levels. With a 50: 1 distance to target ratio, the Extech 42545 infrared thermometer measures smaller surface areas at greater distances. The high temperature Extech 42545 infrared thermometer has a temperature range of -58 to 1832° F ( -50 to 1000° C) . Non-contact temperature measurements are available at the touch of a button with the Extech 42545 infrared thermometer. The built-in laser pointer increases target accuracy while the handy pushbuttons provide convenient, ergonomic operation. The Extech 42545 infrared thermometer features a fixed 0.95 emissivity, which covers 90% of surface applications. Features:  Wide temperature range from -58 to 1832° F ( -50 to 1000° C)  Built-in laser pointer for easy targeting Large backlit LCD display Adjustable emissivity High resolution of 0.1° up to 199.9°  High and low alarm set points