The system monitors inside and outside temperature, air pressure, rainfall, humidity wind speed, wind direction and wind chill factor. The wind & ran sensors connect to the outside temperature sensor which transmits the data to the inside display station. The maximum and minimum readings are stored and can be recalled at the press of a button. You can set alarms to warn you when a specific temperature is reached and the station will even predict future weather conditions using the barometric pressure trends recorded over the preceding 24 hours. The forecast is displayed on the system's screen in an icon style and the barometric pressure trend is displayed as a graph so you can see at a glance how fast the pressure is rising or falling. This is an excellent weather station that fills the needs of the enthusiast as well as those with a more professional interest such as farmers, schools, or anyone with a serious interest in the weather. The system is supplied with all mounting hardware and requires 7 x AA batteries available separately.... » read more