Simple air, infrared thermometer, accurate & reliable laser thermometer with advanced temperature processing to measure surface temperatures, pinpoint laser marks specific area where temperature is taken, lcd display shows temperature to the tenth degree plus or minus 2%, scale ranges from -76 to 932 degrees Fahrenheit, -60 to 500 degrees Celsius, distance to spot ratio 12:1, measures temperature of hvac air vents, appliances, water heaters, doors, & windows, uses 2 "aaa" batteries, included & lasts approximately 180 hours.