1.9-in-1 Multifunctional Air Quality Monitor New improved room air quality monitor that accurately evaluates multiple air quality measurements in one device, including concentrations of formaldehyde (HCHO), PM2.5, PM1.0, PM10, TVOC, temperature, humidity, AQI and a timestamp. Key benefits - Comprehensive measurement: monitors HCHO, PM2.5, PM1.0, PM10, TVOC, temperature, humidity and AQI for a complete view of indoor air quality. - Portable and versatile: compact and easy to carry for monitoring at home, in the kitchen, bedroom, office, school, car, hotel, during travel and camping. Especially useful where babies, children and pregnant women are present. - Easy to use: operate with a single function button; updated manual is simple to understand; can monitor environmental changes over the period you care about; allows setting a formaldehyde reference value. - Reliability: test technique is a semiconductor sensor; sampling type is diffusion type. Use scenarios - Home and residential spaces: monitor living areas and bedrooms to maintain a healthy indoor environment. - On the go and travel: use in cars, offices, hotel rooms, classrooms, and during travel or camping to keep track of air conditions. Specifications - Test technique: semiconductor sensor - Sampling type: diffusion type