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 Battery: 1 * built-in lithium battery, 4.7V, 1200mAh (included)Display: 2.8inch TFT LCD screen with backlightCO2 measuring ranges: 400ppm-5000ppmTemperature measurement ranges: 1 Celsius to 70 CelsiusColour:WhiteMaterial:ABSPackage Contents:1 * air quality monitor1 * usb cableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.