1、【Compact and Exquisite】: The compact body design of this CO2 detector, along with its simple and stylish appearance, makes it lightweight and easy to carry. It has a bright display that shows measurement results. And with the TVOC test function. 2、【High Accurate Sensor】: Adopting a non-dispersive infrared (NDIR) sensor, this device detects and accurately displays the carbon dioxide concentration in the air in real time. The device also integrates temperature and humidity detection functions, allowing you to monitor the air quality around you wherever you are. 3、【Air Quality Classification \u0026 Intelligent Alarm】: It is fitted with a bright display to show measurement results. Equipped with an air quality classification function, this device uses three different colors to correspond to different air quality levels, allowing you to understand the current air conditions more accurately and visually. It also features a sound alarm function to prompt timely action when necessary. 4、【High Sensitive \u0026 Accurate Detection】: The device features a 3D porous housing with multiple ventilation holes to facilitate real-time air circulation and convection. This design ensures that the sensor is in fullcontact with the air, enhancing its sensitivity and enabling accurate detection of small particle content. 5、【Convenient to Carry \u0026 Widely Used】: This device is powered by a 2500mAh high-capacity rechargeable lithium battery and features a Type-C charging port, ensuring long-lasting performance suitable for a variety of complex environments. It can be widely used in various settings, including homes, greenhouses, camping barbecues, factories, automobiles, and for environmental monitoring. This portable air quality tester is equipped with a high-sensitive sensor that offers stable performance and high detection accuracy. It supports real-time detection of CO2 concentration, temperature, and relative humidity. The 3D porous housing is designed with multiple ventilation holes, allowing for real-time air circulation convection. The sensor is in full contact with the air, making it highly sensitive and accurate in detecting small particle content. This device is suitable for various occasions. Features: 【Compact and Exquisite】: The compact body design of this CO2 detector, along with its simple and stylish appearance, makes it lightweight and easy to carry. It has a bright display that shows measurement results. And with the TVOC test function. 【High Accurate Sensor】: Adopting a non-dispersive infrared (NDIR) sensor, this device detects and accurately displays the carbon dioxide concentration in the air in real time. The device also integrates temperature and humidity detection functions, allowing you to monitor the air quality around you wherever you are. 【Air Quality Classification & Intelligent Alarm】:  It is fitted with a bright display to show measurement results. Equipped with an air quality classification function, this device uses three different colors to correspond to different air quality levels, allowing you to understand the current air conditions more accurately and visually. It also features a sound alarm function to prompt timely action when necessary. 【High Sensitive & Accurate Detection】: The device features a 3D porous housing with multiple ventilation holes to facilitate real-time air circulation and convection. This design ensures that the sensor is in fullcontact with the air, enhancing its sensitivity and enabling accurate detection of small particle content. 【Convenient to Carry & Widely Used】: This device is powered by a 2500mAh high-capacity rechargeable lithium battery and features a Type-C charging port, ensuring long-lasting performance suitable for a variety of complex environments. It can be widely used in various settings, including homes, greenhouses, camping barbecues, factories, automobiles, and for environmental monitoring. Specifications: Name: Air Quality Tester Material: ABS Battery: 1 * built-in 2500mAh lithium battery (included) Charging mode: 5VDC Type-C interface CO2 measurement ranges: 400-5000PPM TVOC test ranges: 0.000-5.000mg/m3 Temperature test ranges: -20℃ to 40℃ / -4℉ to 104℉ Humidity test ranges: 20-99%RH Item size: 117 * 73 * 60mm / 4.61 * 2.87 * 2.36in Item weight: 165g / 5.82ounce Package size: 145 * 100 * 75mm / 5.71 * 3.94 * 2.95in Package weight: 320g / 11.29ounce Packing List: 1 * Air Quality Tester 1 * Type-C Cable 1 * Instruction 1 * Air Quality Tester 1 * Type-C Cable 1 * Instruction