General Tools IRT659K Infrared Thermometer, K Type Thermocouple, 12:1 Class 3R Infrared thermometer measurement range is -58 to 1202 degrees Fahrenheit (-50 to 650 degrees Celsius) K type thermocouple measurement range is -146 to 2498 degrees Fahrenheit (-99 to 1370 degrees Celsius) Thermometer measure is K-type thermocouple with 0 to 500 degrees F (-18 to 260 degrees C) range Digital thermometer automatically stores last 10 readings for recall Thermometer automatically holds measurements and displays minimum/maximum/average/difference session values Thermometer has adjustable emissivity from 0.1 to 1.0 (in 0.01 steps), settable high and low temperature alarms and auto power-off