Feature: 1. Compact in size, lightweight and portable, easy to take out and carry around with you. 2. Uses high accuracy semiconductor sensors, with stable working performance, can accurately detect carbon dioxide value. 3. Adopts electrochemical detection module with stable detection performance, anti-interference ability, low consumption and can provides long service time. 4. Large LCD display with backlight, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. 5. Real-time detection, automatic refresh data, with multi-use. 6. Adopts air convection and accurate detection technology, which can provides more accurate detection results. 7. The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide. 8. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc.. Specification: This is a kind of quality air quality detector, compact size, lightweight and portable. Adopts high accuracy semiconductor 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. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc.. Specifications: Name: Air Quality Detector Material: ABS Battery: 1 * built in lithium battery, 3.7V, 1200mAh (included) Display: LCD display with backlight CO2 measuring ranges: 400ppm-5000ppm HCHO measuring ranges: 0-0.6mg/m³ TVOC measuring ranges: 0-2.0mg/m³ Temperature measurement ranges: 0℃ to 50℃ Accuracy: ±1℃ Humidity measurement ranges: 0%RH-99%RH Accuracy: ±5%RH Working temperature: 0-70℃ Working humidity: 20%RH-90%RH Item size: 70 * 90 * 35mm / 2.76 * 3.54 * 1.38in Item weight: 120g / 4.23ounce Package size: 140 * 124 * 41mm / 5.51 * 4.88 * 1.61in Package weight: 180g / 6.35ounce . Package List: 1 * Air Quality Detector 1 * Cable 1 * Guideline