Robinair TIF7620 Infrared Thermometer PRO with 20:1 Distance To Spot Ratio Complete IR design incorporated on a single chip creating compact and lightweight design Innovative optical lens with high accuracy measurements over a wide temperature ranges with a 20:1 distance to spot ratio Maximum (MAX) minimum (MIN) difference (DIF) and average (AVG) temperature modes High and low pass filters with audible alarms for out of range measurements Visual low battery indicators and requires two AAA batteries which are included