This dual-purpose freezer and fridge thermometer monitors internal “room” temperature of the inside of your fridge or freezer and sends it a wireless remote temperature sensor gauge! Two wireless, remote thermometer sensors communicate to the door- or wall-mounted digital display gauge, which provides alerts when freezer or refrigerator temperatures are out of your customized, preferred range. This perfect-for-a-restaurant thermometer helps you store foods at safe temperatures to prevent food spoilage and avoid related foodborne illnesses. The wireless thermometers provide data to the digital thermometer display to show refrigerator and freezer temperatures and record highs and lows for each environment, as recorded by each remote temperature sensor. The programmable alarm notifies you audibly and visually when temperatures rise above or fall below your set minimum or maximum. The digital thermometer display has an integrated magnet and keyhole for easy mounting, and it requires 2 AAA batteries (not included). Each remote temperature sensor requires 2 AA alkaline or lithium batteries (not included). Lithium batteries are recommended for use in sensors for temperatures below 4 degrees Fahrenheit (-20 degrees Celsius). By using this combination of temperature gauge and freezer monitor, you will rest assured that your family or restaurant’s food is stored safely and appropriately. A perfect gift idea for Father’s Day, Christmas, or birthdays, this digital refrigerator and freezer thermometer comes with a one-year limited warranty.