Feature: 1. MULTIPLE FUNCTION: This air quality monitor can be used to detect CO2, PM2.5, PM1.0, PM10, temperature and humidity, which is convenient and practical. 2. HIGH SENSITIVITY: The air quality detector adopts air convection technology to ensure flexible and stable operation, accurate and reliable measurement. 3. 4.3 INCH LCD: The CO2 detector adopts 4.3 inch LCD screen, multi color screen and full angle of view, the values can be clearly seen from any angle. 4. TIME DISPLAY: This air quality detector has a time display function, can be used at any time, suitable for home, office, factory, and classroom, etc. 5. POWER SUPPLY: The air tester adopts Micro USB interface connection, with a built in 3000mAh rechargeable lithium battery and a USB cable for charging. Specification: Item Type: Air Quality Monitor Battery: 1 x 3000mAh Rechargeable Lithium Battery (built in battery) Atmospheric Pressure: 86Kpa-106Kpa PM2.5 PM1.0 PM10 Detection Range: 0-999ug/m³ CO2 Detection Range: 400-5000ppm Detection Temperature: -10-50℃; 14-122℉ Relative Humidity: 20%-85%. Package List: 1 x Monitor 1 x USB Cable1 x User Manual