Inkbird ITH-20 Digital Hygrometer Indoor Thermometer Humidity Monitor with Temperature Humidity Gauge Instant Reading, Max & Min RecordsRead instant , Max and Min temperature & humidity, shown on the same screen. Read it at any time. Air QualityThree degrees for air quality -- DRY/COMFORT/WET, work for Indoor/Outdoor. Easy to Use3 buttons on the back, F/C switching, CLEAR, LCD ON/OFF. Delicate Design2.8inch, both holder & hanging design. Powered by 2xAAA battery (excluded) low power consumption. 1 YEAR WARRANTY!