Welcome to our store! 1, TVOC Sensor: Our carbon dioxide detector, using a semiconductor TVOC sensor, has good accuracy, stable performance, strong anti-interference ability, low consumption, and long service life. 2, Large Screen: The large screen of the carbon dioxide detector displays power, CO2, temperature, and humidity, allowing you to check air quality at any time. 3, Various Font Colors: This carbon dioxide detector uses different font colors to display different air quality, 400 to 800 ppm: green is normal, 800 to 1800 ppm: yellow concentration is slightly higher, more than 1800 ppm: red concentration is super high. 4, Rear Vents: The rear vents not only accelerate the convection between the air and the machine for effective detection but also provide good heat dissipation. 5, Widely Applicable: Our carbon dioxide detector is widely applicable to schools, hospitals, restaurants, shopping malls, offices, etc. Item Type: Carbon Dioxide Detector Material: ABS and electronic components Gross Weight: 380 g/13.4 oz Product Size: 16 x 9.2 cm/6.3 x 3.6 inches Carbon Dioxide Detection Range: 400 to 5000 ppm Accuracy: 1 ppm HCHO Detection Range: 0 to 0.6 mg/M3 TVOC Detection Range: 0 to 2.0 mg/M3 Temperature Measurement Range: 1 to 70 ℃ Accuracy: 1℃ Humidity Measurement Range: 0 percent to 99 percent RH Accuracy: ±2 percent Battery: Built-in rechargeable lithium battery, Model: 18650, Capacity: 1200mAh, shipped with built-in battery 1 x Air Quality Detector 1 x Data Cable 1 x Manual Customer Satisfaction - Customers are our top priority. If you find any problems with the product after receiving it, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service