Economical refrigerator thermometer has a temperature range from -9.9°C to 55.0°C (14.2°F to 131.0°F). Readings can be displayed in either °C or °F. Accuracy is /-0.5°C with a resolution of 0.1°C. Display updates every thirty seconds for convenient temperature monitoring. Compact size allows placement in many locations. Supplied with battery, suction cup mount and calibration ceritificate. Included Probe: Ambient Ambient Temperature Range: 0 to 45°C (32 to 113°F) Ambient Temp Resolution: 0.1° Ambient Temp Accuracy: ±0.5ºC between 0 to 25°C; otherwise ±1.5°C LCD Digit Size: 1/2 inch Dimensions: 1 x 3/8 x 2 1/2 Inches Weight: 1/2 Ounces Traceable: Yes Displays temperature in °C or °F High resolution and accuracy Updates every 30 seconds