This Infrared Calibrator features a microprocessor-based PID temperature controller with precision 100 PT RTD providing accuracy and stability. Swing down the riser to raise the front end for greater visibility and easier programming. Switch between °F and °C to accommodate any thermometer or Test protocol. Fan cools the heater quickly to a lower set point, so you can perform more calibrations. What's included: power cord. Calibrate Infrared thermometers on the go large 2-1/4 inch (57 mm) black body with 0.95 emissivity satisfies most Test geometry requirements self-test upon startup alerts you to malfunctions, saving time dual-line LED shows set point and actual temperatures simultaneously.