Feature: 1. Accurate Monitoring: Provides real time and accurate detection of gas concentration, CO2 concentration, and TVOC concentration in the environment. 2. Wide Detection Range: Detects harmful gas concentration from 0 to 9.999mg/m³, CO2 concentration from 400 to 5000PPM, and TVOC concentration from 0 to 9.999mg/m³. 3. Portable Design: Compact and lightweight air quality monitor, easy to carry and use in different indoor spaces such as homes, offices, and classrooms. 4. USB Charging: Equipped with a 1000mAh lithium polymer battery, tester can be easily charged via USB, ensuring continuous monitoring without the need for frequent battery replacement. 5. Smart 5 in 1 Functionality: Combines the functions of an air quality monitor, gas concentration detector, CO2 detector, TVOC detector, and data logger, providing comprehensive air quality analysis. Specification: Item Type: Air Quality Monitor Battery: 1000mAh Lithium Polymer (included) Harmful Gas Concentration Detection Range: 0-9.999mg/m³ Accuracy: ±(0.001mg/m³+5%) CO2 Concentration Detection Range: 400-5000PPM TVOC Concentration Detection Range: 0-9.999mg/m³ Weight: Approx. 105.00g / 3.7oz. Package List: 1 x Host 1 x USB Data Cable 1 x User Manual