Air Detection: Our Smart Carbon Dioxide Value Tester Gas Analyzer uses vacuum semiconductor 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 1800ppm, 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 1200mAh rechargeable battery that can be removed and equipped with a USB charging cable that can be used while charging. Easy to use: our detector The carbon dioxide 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 carbon dioxide from the air, temperature and air. real-time humidity. The detection value will always change, so there will be a measurement error value. It can perform continuous start-up detection to ensure getting an accurate value. Carbon Dioxide Detector: The smart gas analyzer for carbon dioxide value tester uses TVOC sensor semiconductor air, air quality temperature and humidity. This is a high quality air quality detector, using a module high-quality electrochemical detection device, with good accuracy, stable performance, strong anti-interference ability, low consumption and long service life. Accurate detection of carbon dioxide. The large display shows power, CO2, temperature and humidity. Adopt high quality electrochemical detection module, good accuracy, stable performance, strong anti-interference ability, low consumption and long box life. The product has no no need calibration, it can be tested when powered on, and it can accurately detect carbon dioxide. Large screen displays power, CO2 value, temperature and humidity. Equipped with a large display, different font colors indicate different air quality, 400-800ppm: flashing green, 800-1800ppm: flashing orange, above 1800ppm: red Fengming Alarm Flasher Hundreds of events on the back not only accelerate the convection between the air and the machine for efficient detection, but also ensure good heat dissipation. Colour: white (semiconductor) Quantity delivered: 1 piece