1-Applicable to homes, offices, cars, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshops, libraries, schools, factories and places with air conditioning, etc. 2 degrees Fahrenheit (F) or Celsius (C) conversion, temperature accuracy +/-1C(+/-2F), humidity accuracy +/-5%RH. 3- This portable hygrometer thermometer can measure indoor humidity and temperature in time, helps to adjust humidifier, dehumidifier settings and humidistat, ideal for monitoring your family's living conditions by preventing colds, dry skin, asthma, mold and healthy. 4- Fast response, measuring once every 10 seconds, 24 sensitive VENTS provide updated and accurate readings, wide measuring range: working temperature from 0 to 70 (+32F ~ +158F), working humidity from 10% to 99% relative humidity. 5-Mini Round Digital Humidity Thermometer allows you to easily know the ambient temperature and humidity. Small, durable and portable enough to save space and carry.