Applicable , office, car, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshop, libraries, schools, factories and equipped with air condition, etc.This portable hygrometer thermometer Measures Indoor humidity and temperature in time, help to adjust the humidifier, dehumidifier and humidistats, great for monitoring familys living conditions and health by preventing colds, dry , asthma, mold.Fast response that measures 10 seconds with 24 to updated and accurate readings, wide measuring range that measures temperature from 0.0 to 50.0, measures humidity from 10% to 99%. ( allow for a certain amount of error)Temperature range is Celsius only on this model, bright and black front panel with a clear LCD display, easy to read even from a distance.Measuring humidity accuracy: + 5%Humidity display resolution: 1%RHMeasuring temperature range :0c to 50 CelsiusMeasurement temperature accuracy: + 1 CelsiusTemperature display resolution: 0.1 CelsiusInstall panel hole size: D42mm Operating Voltage: 1.5V, one button cell size LR44colour:BlackMaterial:Plastic shell ABSsize: 45*15.5mmPackage Contents:5*digital hygrometer5*Button Battery