Infrared measurement of foods surface without contact. Perfect for controlling goods at delivery, refrigerated display counters, and cold storage rooms. ±3° C (5.4 °F) accuracy. Operates with 9 volt battery. Recommended for distances between 6 1/3″ and 25 1/5″. Temperature range: -20° to + 260° (-4° to 500°F). Delivered with case.