*Improve air quality by 2 sets of relay to activate fans or air conditioner.
*RS485 Output to connect with human-machine interface or computer for data storage.
*Remote CO2 concentration and Temp. Humi. alarm by meter setting.
*Compatible with large display.
*Compatible with DCPD wireless Zigbee.
*Can be used in such places: hospital, library, commercial building.. any indoor places.