Display the highest and lowest temperatures in the memory / cleanse the memory

On/Off frost point alarm function / Set a group temperature range/alarm on or off

Switch off Celcius or Fahrenheit / Adjust Temperature Range

Press the key MAX/MIN to display the highest indoor and outdoor temperature in memory. Press the key again, it will display the lowest temperatures. Press it again to return to temperature measure state. Hold the key for 3 seconds and the memory will be auto-cleared.

Press ALE key to start the alarm function – LCD display shows ALE ON. Press again and alarm turns off – LCD displays ALE OFF. If the key is not pressed in 2 seconds it will return to temperature state. Hold the key for 3 seconds to go into the outdoor temperature alarm range setting mode. Use C/F key to adjust the temperature value. After the adjustment, When the temperature of the upper line is bigger than the lower line, the outdoor temperature falls within the preset range and the buzzer gives an alarm. When the temperature of the lower line is bigger than the upper line, the outdoor temperature exceeds the preset range and the buzzer gives an alarm. After adjustment press the ALE key to quit the setting function. When giving an alarm the buzzer gives 5 sounds every minute until the temperature returns to range or the alarm is turned off.