Description Description: LCD large screen, different font colors display different air quality, green 400-799ppm, yellow 800-1199ppm, orange 1200-1599ppm, red 1600-1999ppm, 2000ppm above four colors flash at the same time. The product is compact and easy to carry, the ventilation holes in the rear not only accelerate the convection between the air and the machine, to achieve effective detection, but also provides fine heat diipation effect. The product does not need calibration, startup can be tested, accurate detection of carbon dioxide, used in greenhouse farming agricultural production, production warehouse, laboratory, family, etc. Specifications: Item Name: CO2 Detector Material: ABS Color: Black / White Size: 90 * 70 * 35mm Measurement accuracy: 1ppm CO2 measuring range: 400-5000ppm Working voltage: 5V Current: 120mA Power: 0.4W Temperature measuring range: 0-50 Humidity measuring range: 0-99RH Battery: 3.7V, 1200mAh DIY Supplies: Plumbing Gas Type: CO2 With LCD Screen Or Not: Yes Quantity: 1pc Note: -There might be 1-3 cm error of size for manual measurement. -The colors deviation might differ due to different monitor settings, please kindly understand. Packing list Package Includes: 1 * CO2 detector 1 * USB cable 1 * Instruction