Thermometer reads from –328 to 2498°F and –200 to 1370°C with a resolution of 0.1° and 1°. Switch from °F to °C at the touch of a button. Jumbo-size, 5/8-inch-high digits are readable from 10 feet away. Unit features HOLD button that freezes display to capture current reading. Batteries power unit for 1 year of routine use. Total-Range Thermometer is one of the most technically advanced, fastest-reading, yet easy-to-use thermometers ever designed. A microprocessor updates the display twice a second. Rugged unit is constructed of shock-resistant ABS plastic.