AirWits CO2 is a multipurpose meter, equipped with high-quality sensors. It monitors the carbon dioxide levels, indoor air temperature and the air humidity. The device measures and sends the CO2, temperature and humidity data once in every 30 minutes. AirWits CO2 uses worldwide Sigfox IoT-network for data transmission enabaling presentation of data results and accurate notifications. AirWits CO2 is equipped with long life battery pack ensuring a 5-year usage and the device works well in high and low temperatures. The transportation costs of Sigfox IoT-network are low and together with the long battery usage the lifetime costs are very inexpensive.