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About AirQ Check】
AirQ Check – Air Quality Mobile Health Device, use the latest MEMS semiconductor tech. Requiring no power for operation, just plug in AirQ Check can connect to an app and detect whether concentrations of TVOC and CO2 gases exceed limits. Indicators on the casing will flash in green, orange, and red. Also, it will alert you by app sound to remind you, keep away from the air pollution!