Feature: 1. Premium Detection: This air quality monitor is more than enough to detect CO2, temperature, humidity, TVOC, PM2.5, PM1.0, pollen and so on. 2. Better in Control: Able to work in conjunction with home ventilation system to help control the auto ventilation, humidification and more. 3. 7in Clear Display: Equipped with 7in large display, the air quality and temperature and humidity levels are displayed through color grading. 4. Has High Accuracy: Has wide test range and high sensitivity, the accurate results makes the CO2 monitor ideal for home, factory, office, etc. 5. Simple to Install: Light in weight and compact in size as well, the temperature humidity tester is very convenient to install in minutes. Specification: Item Type: Air Quality Monitor Model: PT02 Plus Temperature Measurement Range: -20℃~60℃, ± 2℃. Humidity Measurement Range: 5%~95% RH, ± 5% relative humidity. Carbon Dioxide Measurement Range: 400-5000ppm. Carbon Dioxide Accuracy: ± 50ppm or ± 5% of reading. CO Measurement Range: 0-999PPM CO Accuracy: ± 10ppm or ± 10% of reading. TVOC Measurement Range: 0-19.99mg/m³. TVOC Resolution: 0.01mg/m³. Pollen Measurement Range: 0-500 μ G/m³. Pollen Accuracy: 0-100μG/m³, ± 25μG/m², 101~500μG/m³, reading ± 25%. PM1.0 Measurement Range: 0-500μG/m³. PM1.0 Accuracy: 0-100μG/m³, ± 10μG/m², 101~500μG/m³, reading ± 10%. PM2.5 Measurement Range: 0-500μG/m³. PM2.5 Accuracy: 0-100μG/m³, ±10μG/m², 101~500μG/m³, reading ± 10%. Pollen, PM.0, PM2.5 Resolution: 1μG/m³. . Package List: 1 x Air Quality Monitor1 x User Manual1 x Power Cord Note: Please use a attached 5V 2A plug cable for testing, otherwise it may affect the test results.