G7 pro fresh air system intelligent controller can monitor indoor temperature and humidity, PM2.5, CO2, VOC in real time; WIFI can be connected (optional); With ModBus RTU (RS485) interface, users can connect to smart home and other background monitoring equipment status through ModBus interface; 0-10V voltage signal controls the start and speed of the fan, It can be widely used in residential, commercial and industrial occasions, and can effectively improve air quality to create a healthy, comfortable, efficient, environment-friendly and energy-saving living and working environment.