Air comfort indicatorHumidity temperature gauge features face icons to indicate dry/comfort/wet air condition quickly to notify you to adjust your humidifier or dehumidifier accordingly to create a more comfortable environment. High Accuracy and Quickly Refresh Inside thermometer has high accurate to 1(1.8) and humidity is 5% RH, data measurements are updated every 10 seconds to give you latest changes of the environment. Compact Display with Large Numbers This slim and lightweight size(3.5*3.0in, weights only 30g) hygrometer thermometer is easy to carry. The 2.3 inch large LCD display with big and thick digits allows you to read the temperature and humidity more easily and clearly. Backlight & Clock FunctionWith the backlight and clock function, you will get a clear reading at night or darkness and convenient to set the alarm clock for your work or study. Multiple Mounting OptionsWall thermometer indoor equipped with 2 mounting options including tabletop stand and hanging hole, you can install the wall thermometer anywhere you wish such as living room,kitchen, guitar room, office and cellar, powered by AAA battery (included).