Multiple functions: Color weather forecast indoor or outdoor thermometer and hygrometer MAX or MIN temperature and humidity display Barometric pressure Moon phase daily alarm and snooze function 3-level backlight selection with USB cable, more economical and convenient Clock and daily alarm function: Manual time setting Time also optional 12 or 24 Easy to turn on or off daily alarm with snooze function Weather forecast function: With outdoor wireless remote sensor (within 197 feet) and with 7 color icons Weather symbols show weather fluctuations in the next eight hours, not current weather Thermometer, hygrometer and barometer function: It displays in C or F optional. Min or Max display for air humidity and temperature, air pressure trend display and the outdoor ice alert symbol when the outdoor temperature is 30F to 37F. A handy household tool Power Requirements: Powered by 2 AA batteries (not included) or USB cable (included ). You can select 3 backlight levels by pressing the SNOOZE button when the adapter is plugged in