It is a kind of air quality detector, compact in size, lightweight and portable. Adopts high-precision solid-state sensors, real-time detection, automatic refresh data, multiple use. 2.8 inch large LCD screen, you can clearly see the electricity quantity, CO2 value, HCHO value, TVOC value, temperature and humidity. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, etc. Features: Compact size, beautiful appearance, light and portable, easy to take and carry with you. Uses high-precision semiconductor sensors, with stable working performance, can accurately detect the dioxide value carbon. Adopts electrochemical detection module with stable detection performance, anti-interference ability, low consumption and can provide long service time. 2.8 inch large LCD screen , you can clearly see the electricity quantity, CO2 value, HCHO value, TVOC value, temperature and humidity. Real-time detection, automatic data refresh, with multi-use . Adopts air convection design, which can provide more accurate detection results. Equipped with air quality level division function, 4 different colors correspond to different air quality levels, allowing you to know the current atmospheric conditions more accurately and graphically. The product does not need calibration, it can be tested after startup and it can detect accurately carbon dioxide. The multiple ventilation holes reserved on the case not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat dissipation effect . Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, etc. Features:< /strong> Name?: Air quality detector Material: ABS + PC Battery?: 1 * Built-in lithium battery, 4.7V, 1200mAh (included) Display: 2.8 inch anti-code LCD screen with backlight CO2 measurement ranges: 400?ppm-5000?ppm Temperature measuring ranges: 1 to 70 Item Size: 107*92*46mm/4.21*3.62*1.81in Item Weight?: 100g / 3.53oz Package size: 145 * 125 * 55mm / 5.71 * 4.92 * 2.17inch Package Weight: 200g / 7.05 ounces Packing list: 1 * Air quality detector 1 * cable 1 * Guideline