Item Type: Temperature Humidity Meter
Temperature Measurement Range:
Indoor: -0 °C ~ +50 °C (+14 °F ~ 122 °F)
Outdoor: -50 ° C ~ +70 ° C (-58 ° F ~ +158 ° F)
Humidity Measurement Range: 20% RH ~ 90% RH
Battery: 1.5V (AG13) x 1 (Battery Not Included)
Comfort Range: When the indoor temperature is 20℃ ~ 25℃ (68℉ ~ 77℉) and the indoor humidity is 40%RH ~ 70%RH, it will be displayed. Humidity range greater than 70%RH will display. Humidity range less than 40%RH will display.
When the temperature is greater than 25 ℃ (77 ℉) or less than 20 ℃ (68 ℉) and the humidity is between 40%RH ~ 70%RH, no icon is displayed.

Operation Method:
1. Open the battery cover, remove the battery, and replace the positive and negative poles (positive side up) to replace the battery and put on the battery cover. The machine can be used.
2. Button function:
[MAX/MIN] shows the maximum (MAX)/minimum (MIN) memory value of indoor temperature and humidity and outdoor temperature;
[°C/°F] switching temperature unit is displayed in °C (degrees Celsius) or °F (Fahrenheit);
[CLEAR] clears the maximum/minimum memory value;
[FREEZE ALT] frost point alarm switch;
3. Press the [FREEZE ALT] button for 2 seconds to turn on the (with) / off (none) frost point alarm function.
4. Press the [MAX/MIN] key. When MAX appears on the screen, press [CLEAR] once to clear the maximum value; press [MAX/MIN], when the MIN appears on the screen, press [CLEAR] once. Clear the minimum value.