Features: Compact in size, lightweight and portable, easy to take out and carry around with you. Adopts most high accuracy TVOC sensors, real-time detection, automatic refresh data, with multi-use. Large LCD display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. ℃ and ℉ switchable, with stable detection performance, antijamming ability, low consumption and can provides long service time. Equipped with quality level division function, four different colors correspond to different quality levels, allowing you to more accurately and more graphicly know the current conditions. Hundreds vents on the outshell, not only speed up the convection between and machine to get effective detection but also provides fine heat radiation effect. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc.. Specifications: Material: ABS Battery: 1 * built-in lithium battery, 3.7V, 1200mAh(included) CO2 measuring ranges: 400ppm-6000ppm Item size: 90 * 70 * 35mm / 3.54 * 2.76 * 1.38in Item weight: 100g / 3.53ounce Package size: 145 * 125 * 45mm / 5.71 * 4.92 * 1.77in Package weight: 200g / 7.05ounce Packing List: 1 * Gas Quality 1 * Guideline