[AIR COMFORT HYGROMETER]:The indoor thermometer gauge has a humidity level icon (dry, wet, comfortable) to indicate the air condition of your environment. In order to facilitate your reading, our hygrometer uses large bold numbers, you only need to browse, you can always pay attention to changes in your home [ACCURATE MEASUREMENT & QUICKLY REFRESH]:digital thermometer has high-precision temperature and humidity readings (1 Celsius) and a wide measurement range (-20 Celsius~-70 Celsius/-4 Fahrenheit~158 Fahrenheit; 20%~95%RH). The measuring cycle is updated every 10 seconds to provide you with the latest changes in temperature and humidity at home [GIVE YOU A HHEALTHY LIVING ENVIRONMENT]:The temperature and humidity indicator is equipped with temperature and humidity monitor, which can better adjust the humidity and temperature in your home/room to ensure that you and your family will not feel unwell because too dry or humid [INTELLIGENT UPGRADE DESIGN]:Our thermometer hygrometer are powered by 2 AAA batteries(not including). The instrument will turn on once the battery is installed. Fahrenheit/ Celsius selector; there is a Pre backlight button directly below the thermometer to ensure that you can read normally in any environment Colour:White+blue Material:plastic Size:97 x 75mm Package Contents:1 * Temperature and humidity gauge Only the above package content, other products are not included. Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.