THERMOMETER Features: Widest temperature range from -58° to 1400°F (-50 to 760°C) Built-in laser pointer for easy targeting, high resolution of 0.1° up to 199.9° High 16 to 1 distance to target ratio measures smaller surface areas at greater distances Large backlit LCD display 0.10 to 1.00 adjustable emissivity for better accuracy on different surfaces MAX/MIN/AVG/DIF features display highest, lowest, average, and MAX minus MIN values Automatic Data Hold, auto power off The handheld Extech 42540 infrared thermometer is equipped with a built-in laser pointer to help you identify your target area. In addition, the non-contact Extech 42540 infrared thermometer features a backlit illuminating display for taking measurements at night or in areas with low background light levels. The Extech 42540 infrared thermometer has a distance to target ratio of 16:1, which measures smaller surface areas at greater distances. In addition, the Extech 42540 infrared thermometers has a temperature range of -58 to 1400°F (-50 to 760°C) and adjustable emissivity that ranges from 0.1 to 1.0. Includes: Extech 42540 High Temperature IR Thermometer  9V battery Hard Carrying Case Specifications:  Range / Resolution: -58 to 1400°F (-50 to 760°C) 0.1°C/F. Accuracy:  ±(2% + 2°) at <932°F (500°C) ±(2.5% + 5°) at > 932°F (500°C). Note:  Accuracy is specified for the following ambient temperature range: 64 to 82°F (18 to 28°C).  Emissivity:  0.95 fixed value.  Field of View: D/S = Approx. 12:1 ratio (D = distance, S = spot).  Laser power: Less than 1mW.  Spectral response:  6 to 14 µm (wavelength).  Display:  3 1/2 digit backlit LCD display with function indicators.  Display rate:  1 second approx.  Operating Temperature:  32°F to 122°F (0°C to 50°C).  Operating Humidity; Max. 80% RH.  Power Supply:  9V battery.  Automatic Power Off :  Meter shuts off automatically after 6 seconds.  Weight: 10.2 oz. / 290g.  Dimensions: 3.9 x 2.2 x 9.0” (100 x 56 x 230mm).