Can be used in rugged environments, indoors or outdoors. It has dual three-meter probes, and can store six days of maximum/minimum temperatures for each probe. LCD display turns off to save battery life. Measurement range: -40° to 120°F, accuracy: +/- 1.8°F, operating environment (for thermometer body) -40°F to 120°F, selectable °C or °F. Uses AA alkaline battery (will accept Lithium battery for recording in very low temperatures).