Air-Guardian AQ Air Quality Monitor, Indoor CO2 Monitor (PM2.5, PM10, CO2, VOC, Formaldehyde, Humidity, Temp) Multifunctional Wildfire Air Pollution Detector, Easy Calibration Indoor Air Quality Meter

NO complicated settings, ready to use when turned on. The clear LED screen display shows the colorful bar of AQI, and also the alarm buzzer can be turned off at any time. All improvements are for better customer service.

Long-term monitoring CO2, particulate matter, and VOCs is crucial If you live where there is a risk of wildfire. By measuring particulate pollution, an air pollution monitor can help you know when to change your home’s air filter or open window.

Air-Guardian AQ has added SCREEN DARKENING design. The screen will be dimmed after 4 minutes and 20 seconds of nonuse, so that it will not affect your sleep even in the bedroom at night, and it is more power-saving. Light up the screen by pressing the button.