Real-time indoor air-quality monitor that measures CO2, temperature, particulate matter (PM), TVOC, and HCHO so you can identify problems quickly and take action. Key benefits Real-time, precise readings: Continuous monitoring of CO2, temperature, PM, TVOC, and HCHO gives immediate insight into air quality so you can ventilate, filter, or avoid exposure when levels are poor. Comprehensive pollutant detection: The built-in sensor evaluates particulate matter and volatile organic compounds alongside formaldehyde (HCHO) and CO2, delivering a complete picture of indoor contamination sources. Portable and convenient: Battery-operated and compact for easy placement or transport — use it anywhere indoors without wiring or installation. Clear, actionable display: An easy-to-read LCD shows multiple measurements at once so you can assess air quality at a glance and make informed decisions. What makes it stand out Multi-parameter measurement in one device: Combines CO2, temperature, PM, TVOC and HCHO monitoring to reduce guesswork and eliminate the need for multiple tools. Simple to use anywhere: Compact form and battery power make it suitable for quick checks in different rooms, at the office, or on the go. Designed for practical decision-making: The simultaneous display of key readings lets you see correlations (for example, elevated CO2 with rising temperature in a closed room) and respond appropriately. Practical applications Home: Check bedrooms, living areas, or newly renovated rooms for elevated VOCs or HCHO after painting, new furniture, or cleaning to decide when to ventilate. Office and classrooms: Monitor CO2 and PM to determine when a room needs more fresh air or fewer occupants to maintain occupant comfort and concentration. Travel and temporary spaces: Quickly assess air quality in hotel rooms, short-term rentals, or meeting rooms when you need a portable, battery-powered solution. Features at a glance Measures: CO2, temperature, PM, TVOC, HCHO Display: Clear LCD showing multiple measurements simultaneously Power: Battery-operated for portability Size and design: Compact and easy to move between locations Use this device to monitor indoor air quality reliably, identify pollutant sources, and make timely adjustments to ventilation or filtration for a safer indoor environment.