Features 1、High Accuracy: This air quality monitor is equipped with a high accuracy sensor to ensure accurate monitoring of HCHO and CO2 levels in the air. 2、Color Screen Design: This air quality tester is designed with a color screen that intuitively displays the test results, making it easy for users to understand indoor air quality and take immediate action. 3、Rechargeable Design: This CO2 detector adopts rechargeable design, which is easy to carry and use, no need to replace batteries frequently, environmental protection. 4、Multifunctional: This gas monitor alarm detector is multifunctional and can be used to detect a wide range of gases, such as HCHO, TOVC, CO2. 5、Wide Application: This portable CO2 monitor has a wide range of applications and can be used at home, schools, factories, workshops and so on. Specification Item Type: Air Quality Monitor Material: ABS Battery Type: Lithium Battery ( Shippen With Built In Battery ) Battery Model: 3.7V Battery Capacity: 1000mAh Detection Type: HCHO, TOVC, CO2 in the air Display: LCD 2.8in Segment Screen Atmospheric Pressure: 86Kpa-100Kpa Relative Humidity: 20%-85% Storage Temperature: -20℃-50℃ Package List 1 x Air Quality Monitor 1 x USB Cable