Wireless Temperature/Humidity StationIncludes temperature/humidity sensor, transmitter, and radiation shield. Shield protects against solar radiation and other sources of radiated and reflected heat.Data from up to eight stations may be viewed on a single Vantage Pro2™ Console/Receiver (sold separately) or Weather Envoy and WeatherLink or for a complete set of weather data, use with a Wireless Vantage Pro2™ or Vantage Pro2™ Plus. (You can add up to seven Wireless Temperature/Humidity Stations to either of these.) Station is battery powered. Lithium battery lasts up to one year under normal conditions.Compatible with Vantage Pro2™ only; not compatible with original Vantage Pro™.