Monitor indoor air quality at all times: This indoor air quality sensor helps you monitor the carbon dioxide levels in your room so you can avoid headaches, fatigue and poor concentration caused by prolonged exposure to high carbon dioxide levels and take appropriate measures to ensure air circulation. Multifunctional air quality monitor: With its high-precision semiconductor sensor, it can measure the three parameters of carbon dioxide, formaldehyde and TVOC in the indoor air and simultaneously display the current air temperature and humidity, allowing you to understand the air data in real time. Automatic alarm system: When the CO2 concentration exceeds 1500 ppm, the digital CO2 meter TVOC HCHO monitor for measuring indoor air quality emits an alarm to remind you to ventilate the indoor environment in good time. This is your practical health assistant. Accurate detection: The high-performance analysis chip is used to accurately detect the weak current generated in the electrochemical reaction process of the CO2 detector, enabling more accurate detection. Place the detector in a well-ventilated room during this process. The user interface is simple and intuitive, allowing you to start with just one touch, view all test data and turn the sound on and off without having to perform complicated setup or calibration steps. Long standby time: Portable CO2 monitoring meter. Built-in 1200 mA lithium battery, rechargeable, with a standby time of approximately 240 to 360 minutes and a standby time of ten hours. Compact and portable built-in lithium battery that can be used directly by connecting the USB cable. Monitoring indoor air data: The air quality sensor measures CO₂ levels and helps prevent headaches and poor concentration. Promotes better air circulation. Air quality monitor: The sensor measures CO₂, formaldehyde and TVOC as well as temperature and humidity in real time to ensure accurate monitoring of indoor air. Automatic alarm system: If the CO₂ level exceeds 1500 ppm, the monitor warns you in good time to ensure better ventilation. For healthy indoor air. Accurate detection: The high-performance analysis chip accurately detects CO₂ concentrations. With intuitive user interface and one-button control for quick measurements. Long standby time: The portable CO₂ monitor has a 1200 mAh battery with up to 10 hours of runtime and can be charged via USB. Compact, lightweight and ready to use at any time.