Feature: 1. 9 in 1: Multifunctional air quality detector real-time monitoring of CO2 concentration, CO concentration, TVOC value, HCHO value, PM2.5/PM1.0/PM10 value, temperature and relative humidity in the air. 2. Clear Display: Large digital screen with backlight, clear and easy to read, support alarm function. Multiple display modes are available, you can switch according to your needs. 3. High Accuracy: Using air semiconductor sensor, infrared PM2.5 sensor and electrochemical sensor, plus high-performance chip, detection is more accurate, higher accuracy, and the accuracy can reach 1PPM. 4. Built-in Battery: Equipped with 2000mAh high-capacity rechargeable battery, low power consumption and long endurance, no need to replace the battery frequently. 5. Quick Heat Dissipation: With multiple ventilation holes, which accelerate the convection between the air and the detector, to achieve effective detection and provide a nice heat dissipation effect. 6. Wide Application: Lightweight and portable, it is suitable for home, office, school, warehouse, agricultural planting, etc. No need to calibrate at startup, automatic monitoring. Specification: Item Type: Air Quality TesterColor: White Material: ABS Display: 2.8 Inch TFT Screen CO2 Detection Ranges: 400-6000PPM, ±50±15%PPM CO2 Detection Accuracy: 1PPM CO Detection Ranges: 0-500PPM CO Detection Accuracy: 1PPM TVOC Detection Ranges: 0-2.0mg/m3 HCHO Detection Ranges: 0-0.6mg/m3 PM2.5 Detection Ranges: 0-1000ug/m3 PM2.5 Detection Accuracy: 1ug/m3 PM1.0 Detection Ranges: 0-1000ug/m3 PM10 Detection Ranges: 0-1000ug/m3 Temperature Detection Ranges: -10-50℃, ±2℃ Humidity Detection Ranges: 0-99%RH, ±3%RH Input Voltage: 5V, 1A Battery: Built in 3.7V, 2000mAh Li ion Battery Working Current: 260mA Power: 1W Item Size: 89 x 82 x 36mm/ 3.5 x 3.2 x 1.4in Item Weight: 160g/ 5.6oz . Package List: 1 x Air Quality Tester 1 x USB Cable 1 x Manual