9-in-1 air quality detector monitors CO2 concentration, CO concentration, TVOC value, HCHO value, PM2.5/PM1.0/PM10 value, temperature and relative humidity in real time with stable performance and high detection accuracy. Large-screen LCD digital display, supports alarm function, ideal for home, office, school, warehouse, agricultural environments and more. Features: 9-in-1 functionality: Multifunctional air quality detector that provides real-time monitoring of CO2 concentration, CO concentration, TVOC value, HCHO value, PM2.5/PM1.0/PM10 value, temperature and relative humidity. Clear display: Large digital screen with backlight, clear and easy to read, supports alarm function. Multiple display modes available for user selection. High accuracy: Utilizes air semiconductor sensor, infrared PM2.5 sensor and electrochemical sensor, combined with high-performance chip for accurate detection; accuracy can reach 1 PPM. Built-in battery: Equipped with 2000mAh high-capacity rechargeable battery, low power consumption and long operating life, reducing the need for frequent battery replacement. Efficient heat dissipation: Designed with multiple ventilation holes to enhance air convection between the device and surrounding environment, enabling effective detection and improved thermal management. Wide application: Lightweight and portable design suitable for use in homes, offices, schools, warehouses, agricultural settings and more. No calibration required at startup; automatic monitoring function included. Specifications: Color: White Material: ABS Display: 2.8-inch TFT screen CO2 detection range: 400–6000 PPM, ±50±15% PPM CO2 detection accuracy: 1 PPM CO detection range: 0–500 PPM CO detection accuracy: 1 PPM TVOC detection range: 0–2.0 mg/m³ HCHO detection range: 0–0.6 mg/m³ PM2.5 detection range: 0–1000 µg/m³ PM2.5 detection accuracy: 1 µg/m³ PM1.0 detection range: 0–1000 µg/m³ PM10 detection range: 0–1000 µg/m³ Temperature detection range: -10°C to 50°C, ±2°C Humidity detection range: 0–99% RH, ±3% RH Input voltage: 5V, 1A Battery: Built-in 3.7V, 2000mAh lithium battery Working current: 260mA Power: 1W Product dimensions: 89 × 82 × 36mm (3.5 × 3.2 × 1.4 inches) Product weight: 160g (5.6 oz) Package dimensions: 141 × 98 × 48mm (5.6 × 3.9 × 1.9 inches) Package weight: 240g (8.5 oz) Packing list: 1 × Air Quality Monitor 1 × USB Cable 1 × User Manual