The Air Quality Tester & Formaldehyde Detector is a smart portable device designed to monitor multiple indoor air quality indicators including CO₂, Formaldehyde (HCHO), TVOCs, and particulate matter (PM1.0, PM2.5, PM10). With its 2.8-inch LCD display, users can quickly access real-time values, average readings, and environmental recommendations. This compact device is ideal for homes, offices, schools, and vehicles, providing visual and audible alerts for unhealthy air conditions. Equipped with high-sensitivity electrochemical and optical sensors, and powered by a 1200mAh battery, it ensures peace of mind by helping you maintain a safe and healthy environment. Main Features All-in-One Detection: Measures CO₂, HCHO (Formaldehyde), TVOC, PM1.0, PM2.5, and PM10 2.8" LCD Display: Colour digital screen with real-time and average values, plus air quality advice Built-in Alarms: Sound alerts signal when air quality becomes hazardous 1200mAh Rechargeable Battery: Supports 4–6 hours standby time via USB Type-C charging Ideal for Indoor Use: Perfect for homes, schools, offices, vehicles, and public spaces Specifications / Model Details Feature Description Display 2.8-inch Color LCD Measured Parameters CO₂, HCHO, TVOC, PM1.0, PM2.5, PM10 Formaldehyde (HCHO) Range 0.000–1.999 mg/m³ TVOC Range 0.000–1.999 mg/m³ PM1.0/PM2.5/PM10 Range 0–999 μg/m³ Temperature Range 0–50°C Humidity Range 20–90% RH Detection Error Less than 15% Battery 1200mAh Lithium Rechargeable Charging Time About 4 hours Standby Time Approx. 4–6 hours Interface Type-C USB Input Voltage 5V / 1A Working Environment 5–40°C, <90% RH Material Plastic Colour Black + Orange Weight/Dimensions Standard handheld size, portable Package Includes 1 × Air Quality Tester, 1 × Type-C Cable, 1 × Manual