Infrared Thermometer Monitor Speakers press the trigger only once ISL_TTXND press the trigger only once and then press the trigger again to stop welding OTHER FEATURES Infrared ThermometerDistance to spot size ratio is 30 to 1 at the focal pointUnique flat surface mini modern housing designClass II laser to identify the centre point of the area beingmeasuredMaxmin memoryImpactresistant ABS caseAuto data hold when trigger releasedAuto power offBacklighting illuminates display for taking measurement at nightor in areas with low background light levels Range 50C to 1050C 58C to 1922F Adjustable emissivity from 01 to 10 Dimensions 155 x 100 x 44mm Weight 172g