1. Maximum/Minimum Recording: The freezing thermometer can record the maximum/minimum temperature and display up, down and parallel arrows to indicate the current temperature trend. Press the "℃/℉" key to switch between Fahrenheit or Celsius.
AUDIO ALERT REMINDERS: Has indoor and outdoor audible alarms. It will sound an audible alarm when the temperature exceeds your preset minimum and maximum alarm settings.
2. 24H record: including 24 hours minimum and maximum temperature records, you can easily monitor the temperature change of the refrigerator, providing double protection for your food safety.
3. Temperature range: indoor -10℃~60℃ (14℉~140℉), outdoor -40℃~60℃ (-40℉~140℉), transmission range is 100M/328ft (open area).
4. Battery Power: The digital thermometer is powered by 2 x AAA batteries (not included). The sensor is powered by 2*AA batteries (not included).
5. There are 6 function keys on the host, and a signal indicator on the transmitter. Just press the appropriate button to turn the alarm on/off, toggle Celsius or Fahrenheit, and clear MAX/MIN records.
