This is a kind of quality air quality detector, compact size, lightweight and portable. Adopts high accuracy semiconductor sensors, real-time detection, automatic refresh data, with multi-use. 2.8inch large LCD display, you can see the electricity quantity, CO2 value, HCHO value, TVOC value, temperature, and humidity clearly. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc.. Features: Compact in size, beautiful in appearance, lightweight and portable, easy to take out and carry around with you. Uses high accuracy semiconductor sensors, with stable working performance, can accurately detect carbon dioxide value. Adopts electrochemical detection module with stable detection performance, anti-interference ability, low consumption and can provides long service time. 2.8inch large LCD display, you can see the electricity quantity, CO2 value, HCHO value, TVOC value, temperature, and humidity clearly. Real-time detection, automatic refresh data, with multi-use. Adopts air convection design, which can provides more accurate detection results. Equipped with air quality level division function, 4 different colors correspond to different air quality levels, allowing you to more accurately and more graphic know the current air conditions. The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide. Multiple ventilation holes reserved on the housing 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, and etc.. Specifications: Name: Air Quality Detector Material: ABS+PC Battery: 1 * built-in lithium battery, 4.7V, 1200mAh (included) Display: 2.8inch TFT LCD screen with backlight CO2 measuring ranges: 400ppm-5000ppm Temperature measurement ranges: 1 to 70 Item size: 107 * 92 * 46mm / 4.21 * 3.62 * 1.81in Item weight: 100g / 3.53ounce Package size: 145 * 125 * 55mm / 5.71 * 4.92 * 2.17in Package weight: 200g / 7.05ounce Packing List: 1 * Air Quality Detector 1 * Cable 1 * Guideline