Fast response that measures every 10 seconds with 24 sensitive VENTS to provide updated and accurate readings, wide measuring range that measures temperature from 0.0° to 50.0°, measures humidity from 10% to 99%. (Please allow for a certain amount of error) This portable hygrometer thermometer Measures Indoor humidity and temperature in time, help to adjust the humidifier, dehumidifier settings and humidistats, great for monitoring family‘’s living conditions and health by preventing colds, dry skin, asthma, mold. Applicable for home, office, car, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshop, libraries, schools, factories and places equipped with air condition, etc. Temperature range is Celsius only on this model, bright and black front panel with a clear LCD display, easy to read even from a far distance. Measuring humidity accuracy: + 5%