*High brightness OLED display.
*Improve air quality by 2 sets of relay to activate fans or air conditioner.
*When air concentration higher or lower than setting value, the buzzer will ring.
*Can store historical data by SD card.
*RS485 Output to connect with human-machine interface or computer for data storage.

*Ethernet: RJ45, Modbus TCP (customized).
*Remote connection and alarm by mobile devices (APP).
*Compatible with large display (customized).
*Compatible with wireless zigbee (customized).
*Can be used in such places: hospital, library, commercial building / office, parking garage and any indoor places.