Applicable for home, office, car, schools, hotels, laboratories, kindergartens, aquaculture, instrument workshop, libraries, schools, factories and places equipped with air condition, etc.<br> This portable hygrometer thermometer Measures Indoor humidity and temperature in time, help to adjust the humidifier, dehumidifier settings and humidistats, great for monitoring familys living conditions and health by preventing colds, dry skin, asthma, mold.<br> 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)<br> 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.<br> Measuring humidity accuracy: + 5%<br> Humidity display resolution: 1%RH<br> Measuring temperature range :0c to 50 Celsius<br> Measurement temperature accuracy: + 1 Celsius<br> Temperature display resolution: 0.1 Celsius<br> Install panel hole size: D42mm<br> Operating Voltage: 1.5V, one button cell size LR44<br> colour:Black<br> Material:Plastic shell ABS<br> size: 45*15.5mm<br> Package Contents:<br> 5*digital hygrometer<br> 5*Button Battery