Air detection: Our intelligent carbon dioxide value tester gas analyzer uses a vacuum solid-state TVOC sensor. real-time and accurate CO2 concentration, TVOC, formaldehyde, ambient humidity and temperature, with date and clock display. Automatic alarm system : Our carbon dioxide instrument is easy to use. No calibration is required, and it can be tested at startup, when the carbon dioxide concentration exceeds 1800 ppm, an alarm will be issued to inform you to keep the indoor environment ventilated in time. Built-in battery: Our carbon dioxide instrument contains a 1200 mAh rechargeable battery that can be removed and equipped with a USB charging cable that can be used while charging. Easy to use: our detector carbon dioxide monitor is compact and portable and can clearly display the temperature and humidity of the environment. Suitable for offices, bedrooms, gymnasiums and other usage scenarios. Warm tips: Our carbon dioxide detector can detect air carbon dioxide, temperature and humidity. humidity in real time. The detection value will change constantly, so there will be measurement error value. It can carry out continuous start detection to ensure obtaining an accurate value. Carbon dioxide detector: The intelligent gas analyzer for carbon dioxide value tester uses TVOC sensor semiconductor air quality detector, temperature and humidity. This is a high-quality air quality detector, using a module high-quality electrochemical detection sensor, with good accuracy, stable performance, strong anti-interference ability, low consumption and long service life. Accurate detection of carbon dioxide. The large screen displays power, CO2, temperature and humidity. Adopt high-quality electrochemical detection module, good precision, stable performance, strong anti-interference ability, low consumption and long box life. The product has no no need for calibration, it can be tested when turned on and it can accurately detect carbon dioxide. The large screen displays power, CO2 value, temperature and humidity. Equipped with a large display, different font colors indicate different air quality, 400-800 ppm: flashing green, 800-1800 ppm: flashing orange, above 1800 ppm: red Flashing Fengming Alarm Hundreds of vents on the back not only accelerate the convection between the air and the machine for effective detection, but also ensure good heat dissipation. Color: white (semiconductor) Quantity delivered: 1 piece