Backlight Display hold Optional auto power off after 12 minutes Low battery indication Set up retention (when switched on the last settings used are displayed) K-type thermocouple based industrial thermometers Designed to suit a wide variety of process, industrial and HVAC applications Dual input °C/°F selection Differential input A or B, A-B Max/Min recorder These instruments can be calibrated with probes for K, J and T type thermocouples only as a System Calibration. To order please use the System Cal. stock number of the instrument and the System Cal. stock number of the probe.