Suitable for home, office, car, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshop, libraries, schools, factories and equipped with air conditioning, etc. This portable hygrometer thermometer measures indoor humidity and temperature in time, helps to adjust the settings of humidifiers, dehumidifiers and hygrometers, perfect for monitoring family living conditions and health by preventing colds, dry skin, asthma, mold. Quick response measuring every 10 seconds with 24 sensitive VENTS to provide updated and accurate readings, wide measuring range measuring temperature from 0.0 to 50.0, measuring humidity from 10% to 99%. (Please allow a certain margin of error) The temperature range is Celsius only on this model, bright and black front panel with a clear LCD screen, easy to read even from a long distance. Humidity measurement accuracy: + 5% Humidity display resolution: 1%RH Measuring temperature range: 0c to 50 Celsius Temperature measurement accuracy: + 1 Celsius Temperature display resolution: 0.1 Celsius Panel installation hole size: D42mm Operating voltage: 1.5V, one LR44 size button cell Color: Black Material: Plastic shell ABS Size: 45*15.5mm Package content: 5*digital hygrometer 5*button cell battery