Air Comfort IndicatorThe hygrometer thermometer has a surface icon that quickly indicates dry/comfortable/humid air conditions to notify you to adjust the humidifier or dehumidifier accordingly to create a more comfortable environment. High Accuracy and Fast RefreshThe internal thermometer has an accuracy of up to 1 (1.8) and humidity is 5%RH, and the data measurement is updated every 10 seconds to provide you with the latest environmental changes. Compact Large Digital DisplayThis thin and light (3.5*3.0 inches, weighing only 30 grams) hygrometer thermometer is easy to carry. The 2.3-inch large LCD display with large and thick numbers allows you to read the temperature and humidity more easily and clearly. Backlight and Clock FunctionWith the backlight and clock function, you can read clearly at night or in a dark environment, and it is convenient to set an alarm for your work or study. Multiple Installation OptionsThe indoor wall-mounted thermometer comes with 2 installation options, including a desktop bracket and a hanging hole, you can install the wall-mounted thermometer anywhere you want, such as living room, kitchen, guitar room, office and cellar, powered by AAA batteries (included).