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English - 9
Foam Cover*
• Before use, please take off
the foam cover. Otherwise it
will cause abnormal motor
operation and failure.
• After use, please put back the
foam cover.
* For model X-2700 only.
Foam Cover
Air Quality Monitor (Continued)
Index Light
Levels of Health Concern according to the AQI by EPA
Green / Good
Good
Orange (Yellow) /
Moderate
Moderate or, Unhealthy for Sensitive Groups
Red / Poor
Unhealthy, or Very Unhealthy, or Hazardous