DIGITAL Infrared Thermometer is an easy-to-use thermometer. Only by pointing to the object and pulling the trigger will the temperature appear on the display. It incorporates laser pointer for maximum precision. It can be used on the oC or oF scale. The distance / diameter ratio is 12:1. The measurement response time is ≤0.5 seconds. Your temperature range is among the -50o 550o (-581022F). The instrument incorporates an LCD display with lighting and functions of “autopower off” that maximizes the life of the 9 volt battery (including battery). Its environmental storage and working conditions are recommended in a temperature range ranging from 0 to 40oC and humidity from 10 to 95%HR.