Features:
* Indoor/outdoor temperature & indoor humidity display
* Temperature unit ℃/℉ changeable
* Memorized MAX/MIN values of indoor/outdoor temperature and indoor humidity
* Frost point alarm:-1℃～+4℃ (+30.2℉～+39.2℉)
* Display of comfort degree
Temperature Range:
indoor temperature:  -10℃～+50℃ (+14℉～+122℉)
outdoor temperature:-50℃～+90℃ (-58℉～+194℉)
Humidity Range: indoor 20% RH～90% RH
Product Dimension:    82× 70× 20mm
Power-supply: 1.5V (AG 13)x1