– main sensor that measures temperature, CO2 levels, humidity and noise levels.
– outdoor sensor that measures temperature and humidity
– very important has full IFTTT integration so all sorts of fun links to other devices can be done. If humidity is to high my air-conditioning unit is started in de-humidifier mode. If the temperature is too high again the air-conditioning will be started. If your air con is not IFTTT enabled you can achieve this by using some sort of intelligent socket (like WeMo)
This is a very nice weather station with additional inside sensors. You can monitor the environment from inside and outside the house from the smart phone or from the netatmo web account.