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, self-calibration with multi-use. Large LCD color display, you can see the electricity quantity, CO2 value, PM2.5 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 Color: black, white (optional) Battery: 1 * built-in lithium battery, 5V, 1200mAh (included) Display: LCD display with backlight PM2.5 measuring ranges: 0-999μg/m³ HCHO measuring ranges: 0-9999μg/m³ CO2 measuring ranges: 0-5000ppm TVOC measuring ranges: 0-9999μg/m³ Temperature measurement ranges: 0-70°C Humidity measurement ranges: 0-99%RH Item size: 70 * 90 * 35mm / 2.76 * 3.54 * 1.38in Item weight: 120g / 4.23ounce Package size: 147 * 120 * 43mm / 5.79 * 4.72 * 1.69in Package weight: 200g / 7.05ounce Packing List: 1 * Air Quality Detector 1 * Cable 1 * Guideline