
The display is small, but visibility is excellent. For those concerned about pollution, wildfire smoke and "closed" interiors. The two most important numbers are large and by default on the first screen: carbon dioxide and PM2.5 Indoors, carbon dioxide levels easily and quickly increase to: 1. Become confused; 2. confused; i3. Dangerous to health and life. Air exchange and/or CO2 removal must be monitored and performed. PM2.5 feedback is required for proper cleaning. Clean with air purifiers and activated carbon scrubbers.

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