DEWALT's 12V MAX Lithium Ion Infrared Thermometer, No. DCT414S1, is ideal for scanning for temperature changes on the jobsite and locating potential trouble spots. In addition to the patent-pending LED hot (red) and cold (blue) spot indicator, it also provides audio alarms. It measures temperatures from negative 20 degrees F to 932 degrees F. It records maximum, minimum and average temperatures and features a backlit display for easy-to-read recordings.