Refrigerator/Freezer/Fridge Digital Thermometer Alarm Maximum Minimum History About This Item Monitors home and commercial Refrigerators and Freezers. Fridge thermometer gives you peace of mind knowing your cooler is operating at the just the right temperature at all times. This freezer thermometer with alarm preserves the quality, longevity, and safety of food. Min and Max Memory Function You can easily check the Max and Min temperature record by pressing "Min/Max" button. If you don't need this record, just pressing the button for 2 seconds to clear it and reset a new record. TWO ALARM SETTINGS monitor High and Low temperatures. Alarm sounds if temp rises or drops below the limits you set. Also records temperature history to show temps while you were away.  Auto resets history every 24 hours. Additionally records relative humidity. Water resistant probe extends inside. EASY TO READ thanks to Large, Bright LCD Display with big 5/8 inch numbers. This medical refrigerator thermometer features a one button toggle from Indoor Room to Refrigerator / Freezer Temperatures. Button manually sets alarms. Great for camper refrigerator thermometer, to watch chest freezer temperature, and walk in cooler thermometer. TEMPERATURE RANGE:  -58 to 158°F (-50 to 70°C) with an Accuracy of +/- 2°F. Professional grade thermometer for home, pharmacies, laboratories, hospitals, universities, restaurants, camps and RV owners. Monitors safe temperatures in your refrigerator and freezer with accurate temperature readings. This makes a great gift for friends, family, and co-workers. SAFE WITH THIS PROFESSIONAL DIGITAL THERMOMETER WITH ALARM for refrigerator and freezer. This gives you a constant read out of temperature. Easily set the alarm to sound if temp goes above or below your desired levels. Also records history so you know temp while you were away. Check just once daily to ensure temperature has been maintained for food safety, longevity, and freshness.  THREE MOUNTING OPTIONS let you quickly and easily mount this on your refrigerator or freezer with no tools needed. Use the built in Magnet, hang on Key Hole, or sit it up on it's Flip Down Stand. This can be installed on your unit in just seconds giving you very reliable temperature monitoring to ensure safety and consistency of foods inside.   Product Specs  Water-resistant sensor probe Has (2) two alarm settings: high and low temp alarm Features a audible alarm ( loud beep ) Reads and displays both  room and refrigerator temp Measures temperature from -58° to 158°F (-50° to 70°C, Accurately monitors temperatures in refrigerators, freezers, and incubators Comes with a 58" long detachable wire sensor Battery: 1.5 volt AAA battery (NOT INCLUDED)