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New flip-to-open design is easy to use. Stainless-steel probe may be positioned at any angle. Fold-up, protected probe permits carrying on the wrist strap or in a pocket. Big-digit, 3/4-inch-high display may be viewed at a glance. Shockproof in drop tests up to 5 feet. Reading is updated every second Features include °F/°C switch, minimum and maximum memory readings over any time period, and a HOLD switch (freezes the display to capture a temperature). Wide range covers 99 percent of routine temperature measurements: –58 to 572°F and –50 to 300°C. Resolution is 0.1° from –20 to 200° (1° outside this range). Accuracy is ±1°C between –20 and 100°C. Ultra™ model accuracy is ±0.3°C at tested points. Traceable to NIST for accuracy To assure accuracy an individually serial-numbered Traceable® Certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Dimensions are a 0.14 inch stem diameter, 4-1/2-inch stem length, an extended length of 11 inches, 6-inch folded length, width of 5/8-inch and 1-1/2-inch-height. Weight is 2-3/8 ounces. Replacement battery Cat. No. 1105.