Press Max-Min/Clear button once to display the Max relative humidity & temperature. Then press button again to relative humidity & temperature. Then press button once again to reurn the normal relative humidity & temperature.At any time press and hold Max-Min/Clear button 2 secords;and jump to normal reading mode.
.Press ALERT about 3 seconds, the LCD display sign*,it will alarm
When outdoor/indoor temperature is within the alert range(-1℃~+4℃,30.2℉~39.2℉).press ALDRT about 3 seconds,the sign* close display it will not alarm
.At any time press Max/min button,when display Max or Min
Then press clear button,it will clear Max and Min temperature memory records,and jump to normal reading mode
