This 16-in-1 air quality monitor is $23 off, dropping to $77 from its regular $100 price at Amazon. It's the best price Amazon has charged for this model. It tracks CO2, PM2.5, PM10, HCHO, TVOC, temperature, and humidity on a single 7" display, with a built-in buzzer that alerts you when readings exceed set thresholds. Buy Now at Amazon Features Tracks CO2, PM1.0, PM2.5, PM10, HCHO, TVOC, temperature, humidity, and AQI 7" display screen with adjustable brightness Built-in calibration support for
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