Require connection to WiFi 2.4GHz ,and no hub required. After configuration, it supports full functionality. APP Remote Monitor:Pay attention to changes in temperature and humidity,and care for your family. Large screen display:Using a large screen narrow border design,the display content is diverse,the digital display is clearer , at a glance, and can be seen clearly from a distance. Temperature and humidity history:You can view the historical data graph of temperature and humidity on the app and export the data to your mailbox. Backlight display Supported:At night or in dim scenes ,you can tap the light icon to trigger the backlight,so you can see the screen clearly. Temperature Humidity adjust:You can calibrate the temperature and humidity in the set if need , just select the value , then press the reset button once,the calibrated temperature and humidity will sync on the screen and in the App . Temperature and humidity alarm reminder:You can preset the upper and lower limits of temperature and humidity on the app,and when the temperature or humidity exceeds the set range,the app will push a message to the mobile phone Low power consumption ultra-long standby:Powered by 3PCS x AAA AIkaIine batteries (Not included batteries),which is super power-saving and long-term standby. Maximum/Minimum Values Display:Display the temperature and humidity maximum/minimum values ,intuitively feel the recent temperature and humidity changes, and provide protection for the health of the family. Temperature Unit Switch:You can switch temperature unit between Celsius and Fahrenheit by pressing the reset button once, the temperature display will sync on the screen and in the app. 12 / 24 Hour Switch Display:Double press the reset button ,you can switch the 12-hour and 24-hour display on the screen ． Color: White Material