Along with 20:1 (D:S) and -22 to 1,400°F range, MicroRay AUTO provides hold and max/min/difference functions as well as high/low alarms. Built-in flashlight and laser sight facilitate operation, and 64 internal test memory, PC software capabilities, and adjustable emissivity promote functionality. Portable thermometer is suited for checking engine diagnostics, cooling systems, electrical circuits, and climate control diagnostics.