The CO2 PM2.5 Multifunction Air Quality Detector is a compact all in one monitor that measures carbon dioxide, PM2.5 and dust, formaldehyde HCHO, and TVOC, plus temperature and humidity for a complete view of indoor air. - Why you need it: real time data to keep your home safe and comfortable, reduce exposure to pollutants, and guide ventilation decisions. - Key features: PM2.5 detected with a laser scattering sensor for fast, accurate readings; HCHO and TVOC monitored with a semiconductor sensor; CO2 tracked with a dedicated sensor; temperature and humidity included for context. - Benefits: clear readings help you decide when to ventilate, adjust activities, or improve air quality in any room. - Design and placement: compact size fits on a desk, shelf, or nightstand; simple to set up in living rooms, bedrooms, or offices. - Use scenarios: cooking in the kitchen to monitor smoke and pollutants; bedroom monitoring CO2 and humidity for better sleep; office or study to maintain a comfortable, productive environment. - Why choose this device: an all in one solution that delivers reliable, practical air quality data for daily home use.