Oregon Scientific John Deere Wireless Long-Range Weather Forecaster with Barometric Pressure Readout Wireless weather station; monitors temperature and humidity in up to 3 locations (additional sensors required) Sensor transmission range: 300 feet; clock sets to the U.S. Atomic Clock Barometric pressure has a numeric display reading with historical scanner 3 Levels of pressure, humidity and temperature indicators: Rising, Steady or Falling Crescendo alarm with snooze function; requires four AA (main unit); two AA (sensor)