Fluke 62 MAX Infrared Thermometer, AA Battery, -20 to +932 Degree F Range with a NIST-Traceable Calibration Certificate with Data Your unit is calibrated prior to shipment with a new nist-traceable calibration Certificate with data The NIST calibration provides you assurance your instrument Meets manufacturers specifications. Your instrument is ready to Use day one meeting most quality system standards 10:1 infrared distance-to-spot ratio with laser sighting for pinpointing the measurement area Displays the minimum, the maximum, the difference between the two temperatures, and the average temperatures Certified IP54 for protection against dust and splashing liquid