Brunton ADC Summit Atmospheric Data Center. Calculates altitude based on barometric pressure and predicts the weather for the next 12 hours. Displays current barometric pressure (hPa, mb, or Hg). Storm alarm; past 24 hour pressure tendency; 12 hour weather forecast; altimeter shows current, max, min altitude (in meters or feet). Altitude alarm; ski run counter; current temperature; past 24 hour temperature tendency; current, max and avg wind speed; wind chill avg and min wind chill; wind chill alarm; alarm clock, time, day and date; chronograph race timer. Waterproof, submersible. Water-flow meter. Manual and automatic date logging. Infrared data communication with PC using ADC-IR (sold separately). Data download in universal format. Includes lanyard and extra battery. Hang packaged.