This unique portable thermometer displays data from 4 thermocouple probes simultaneously on a large backlit LCD. Communicates with a computer via the bi-directional RS232 port and optional cable, and graphic software. Auto ranging with auto power off, minmax, hold and relative functions. High full scale accuracy of ±0.5% rdg. + 1°C / 2°F. Easily calibrates to ice point, or any other standard. 0.1° resolution <200° & 1° >200°C. Wide measurement range of ?328 ~ 2498°F (-200 ~ 1370°C). Comes ready to use with 2 beaded wire probes, instructions, and a 9V battery, in a protective, foam lined, case.