Suitable for home, office, car, school, hotel, laboratory, kindergarten, aquaculture, instrument workshop, library, school, factory with air conditioning This portable hygrometer thermometer can timely measure indoor humidity and temperature, which is helpful to adjust humidifier, dehumidifier settings and humidifier, and is very suitable for monitoring family living conditions and health conditions, preventing colds, dry skin, asthma, mold. Responsive, measuring every 10 seconds, using 24 sensitive vents, providing the latest and accurate readings, with a wide range of measuring temperature range of 0.0 to 50.0, and measuring humidity range of 10% to 99%. (Please allow some error) The temperature range of this model is only in Celsius, and the bright black front panel with a clear LCD display is easy to read even at a distance. Humidity measurement accuracy: 5% Humidity display resolution: 1%RH Measuring temperature range 0 to 50 Temperature measurement accuracy: + 1 degree Celsius. Temperature display resolution: 0.1 degrees Celsius. Installation panel opening size: D42mm Working voltage: 1.5V, single button battery size LR44 Color: Black Material: ABS plastic shell Size: 45*15.5mm Package contents: 5*digital hygrometer 5 button batteries