The General Tools IRT207 Laser Thermometer is the perfect tool for HVAC/R, plumbing, heating, electrical, automotive and other industrial jobs. It has a backlit LCD display with temperature readings ranging from -4 to 608 degrees F (-20 to 320 degrees C). It features a sighting laser and Fahrenheit/Celsius readout. Plus, it's CE RoHS and Wee approved and comes with a 9-volt battery included. Distance-to-spot (D:S) ratio: 8:1 Measurement range: -4° to 608°F (-20° to 320°C) Measurement accuracy: ±3.6°F (±2°C) or 2% of reading (whichever is greater) above 32°F (0°C); ±5.4°F (±3°C) or 2% of reading (whichever is greater) below 32°F Measurement resolution: 0.1° Emissivity: Fixed at 0.95 Auto power off: After 6 seconds of inactivity Operating temperature: 32° to 104°F (0° to 40°C) @ 10 to 90% RH Weight: 4.41 oz. (170g) without battery Power source: "9V" battery (included) Includes Battery 1-year limited warranty Dimensions 5.98 x 4.65 x 1.26 in. (152 x 118 x 32mm)