4. When the alarm sounds press the LIGHT/SNZ button (on front or back of monitor), the alarm will sound again in 5 minutes. 5. To turn the alarm off press the ALARM button when the alarm sounds. 6.0 Maximum and Minimum Memory 1. Press the MAX/MIN button once to display the maximum indoor and outdoor temperature readings. Press the MAX/MIN button again to display the minimum indoor and outdoor temperature readings. 2. To clear the memory, press and hold the MAX/MIN button for 3 seconds.