Monitors CO2, formaldehyde (HCHO), temperature, and humidity with a clear, easytoread digital display. Realtime airquality readings help you identify problems quickly and take corrective action to protect health and comfort. Key benefits Know when air is unhealthy: continuous CO2 and formaldehyde detection lets you spot elevated levels before they affect comfort, concentration, or health. Maintain comfort and equipment safety: temperature and humidity readings support better HVAC decisions and help prevent mold or condensation issues. Fast, understandable feedback: the clear digital interface displays current values at a glance so you can act immediately. Portable and versatile: designed for use at home, in the office, or while traveling so you can monitor air quality wherever you go. What it does (functions) Measures CO2 concentration in real time to indicate ventilation needs. Detects formaldehyde (HCHO) levels to alert you to VOC exposure from furniture, paint, or building materials. Reports ambient temperature and relative humidity to help maintain thermal comfort and protect belongings. Displays all metrics on a clear digital screen for straightforward monitoring. Performance and usability Realtime updates provide actionable information without delay. Intuitive digital interface makes readings simple to interpret for nontechnical users. Compact, travelfriendly form factor for easy placement on a desk, shelf, or in a bag. Practical use scenarios Home: Check formaldehyde levels after installing flooring or furniture to decide whether to increase ventilation or air out the room. Office: Monitor CO2 in meeting rooms or openplan spaces to determine when to open windows or adjust HVAC to improve focus and reduce drowsiness. Travel: Carry the unit to hotel rooms to verify ventilation, temperature, and humidity before settling in. Why customers rely on it Provides the core indoorair metrics people most commonly need to assess safety and comfort: CO2, formaldehyde, temperature, and humidity. Simple digital readout and realtime monitoring make it a practical tool for everyday decisions without technical complexity. Suitable for homeowners, office managers, frequent travelers, and anyone who wants a clear snapshot of indoor air quality. Included functions summary CO2 monitoring Formaldehyde (HCHO) detection Temperature measurement Humidity measurement Clear digital display for immediate reading and monitoring Use this device to make informed, timely decisions about ventilation and indoor environments, improving comfort and reducing exposure to airborne pollutants.