Feature:1. Comprehensive Air Quality Monitor: Air quality monitor is a versatile device that can detect HCHO, TVOC, PM2.5 1.0 10 particles, temperature, humidity, and even has a clock and recording function.2. Scientific Monitoring: Combining multiple air sensors and a built in fan, air quality monitor provides real time monitoring of HCHO, TVOC, PM2.5/1.0/10, temperature, and humidity. The results are displayed on a digital LCD screen.3. High Resolution Color LCD Display: Equipped with a 2.8in color LCD screen with a resolution of 320x240 pixels, air quality tester ensures clear and easy to read display of the air quality data.4. Accurate Real Time Monitoring: The built in fan of air quality monitor draws in ambient air to obtain more accurate real time results for testing variables such as PM2.5 1.0 10, HCHO, TVOC, temperature, and humidity.5. Advanced Sensor Technology: The PM2.5 sensor technology is based on scattering principles, while the HCHO TVOC technologies utilize semiconductor sensors. The temperature and humidity sensors further enhance the overall monitoring capabilities of the device.Specification:Item Type: HCHO DetectorMaterial: ABSPower: Built in 2000mAh Lithium BatteryTesting Parameters: PM2.5 1.0 10, HCHO, TVOC, Temperature, HumidityDetection Range: AQI(0-500), PM2.5(0-999 ug/M3), HCHO(0.001-1.999 Mg/M3), TVOC(0.001-9.999 Mg/M3)Display: 2.8inch LCD Screen, 320 x 240 pixelsAtmospheric Pressure: 86Kpa - 106KpaTesting Temperature: -10 to 50 (14 to 122)Relative Humidity: 20%-85%Storage Temperature: -10 to 60 (14 to 140)PM (PM2.5/1.0/10) Concentration Units : ug/mHCHO and TVOC Concentration Units: mghm.Package List:1 xHCHO Detector1 x English Manual1 x Charging Cable