Wide-Range Big-Digit Refrigerator Thermometers 7/8-inch high display is easy to view. Switchable range is from 32 to 113°F and 0 to 45°C with a resolution of 0.1°. Accuracy is ±1ºC in the range 0 to 25°C and ±1.5°C outside range. Ultra# model accuracy ±0.5°C at tested points. May be placed anywhere using four methods: Always-hold# secure suction cup, place-anywhere hook & loop, stand, and hanger. Display updates every 30 seconds (this allows capturing a reading while allowing a momentary open refrigerator door). Wide range of the thermometer also makes it an ideal unit to monitor temperatures in storerooms, labs, offices, hoods, and outdoors.