This complete forecasting solution contains all the tools you need to track indoor/outdoor temperature and humidity, barometric pressure, wind speed and rainfall. Plus, the LCD display shows weather forecast icons based on barometric pressure and weather tendency arrows. There's even a perpetual day/month/date calendar plus a 12/24 hour atomic alarm clock that accepts signals from the U.S. atomic clock in Fort Collins, Colorado and resets itself daily for accuracy of one-millionth of a second. Comes with rain collector, wind sensor, and thermo-hygro sensor that relay weather data to the receiver at distances of up to 600 feet. 3 'AAA' & 2 'AA' batteries required (not included). 1-year limited warranty.