High precisionTemperature measurement range: -50 ~ + 70 (-58 F ~ + 158 F), temperature measurement accuracy: 1.0 ; measurable humidity range: 10% RH ~ 99% RH, accuracy: 5%. Fast responseThis portable room thermometer has a built-in precise and sensitive sensor that is updated every 10 seconds, and helps you know the ambient air conditions. Multifunctional humidity thermometerIt is not only a weather station, with alarm clock function, and switch, night light, calendar. Our indoor hygrometer with backlight provides real-time temperature/humidity measurement values and maximum/minimum records. Intelligent comfort level display: The smiling face on the room thermometer (humidity 40%~70%, means "pleasant", humidity 70% or 40% means "unpleasant" that you should adjust your humidifier or dehumidifier accordingly to create a more pleasant environment. Flexible placement: Compact design, contains two AAA batteries. Can be hung on the desk or wall, or you can install the wall thermometer in any place. Delivery quantity: 1 piece