Suitable for use in homes, offices, cars, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshops, libraries, schools, factories and places where available. This portable hygrometer thermometer measures indoor humidity and temperature in time to help adjust humidifiers, dehumidifier settings and humidifiers, and is great for monitoring home living conditions and health by preventing colds, dry skin, asthma, mould and mildew. Fast response, measuring every 10 seconds, with 24 sensitive vents to provide up-to-date and accurate readings and a wide measurement range from 00 to 500 for temperature and 20% to 90% for humidity. (Please allow for a margin of error) This model has a temperature range of just degrees Celsius and a clear LCD display on the black front panel that is easy to read even from a distance. Resolution of humidity display: 1% RH measurement Temperature range: -50 to 70C measurement Temperature accuracy: + 1 degree Celsius temperature display Resolution: 01 degree Celsius Measurement error: 1C Operating voltage: 15V, (one AG13 button) Colour: Black Material: Plastic Working principle: Thermistor conversion temperature display Package content: 5* digital hygrometer