This portable air quality tester is equipped with a highsensitivity sensor that offers stable performance and high detection accuracy. It supports realtime detection of the air quality index, formaldehyde, organic pollutants, PM2.5, PM10, carbon monoxide, carbon dioxide, temperature, and humidity. The 3D porous housing is designed with multiple ventilation holes, allowing for realtime 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 Size & Remote Tuya APP Control: The compact body design of this CO2 detector, along with its simple and stylish appearance, makes it lightweight and easy to carry. Wallmounted design, builtin multiple sensors for realtime detection and realtime data refresh. The WIFI function supports realtime data viewing on your mobilephone via Tuya or SmartLife APP.  Multifunctional Design: This device has a multifunctional design, supporting the detection of the air quality index, formaldehyde, organic pollutants, PM2.5, PM10, carbon monoxide, carbon dioxide, temperature, and humidity, allowing you to know the air quality around you wherever you are. It also Features a realtime curve view function, enabling you to see the trend curves of eight groups of parameters: HCHO, TVOC, PM2.5, PM10, carbon monoxide, CO2, temperature, and humidity. Air Quality Classification & Intelligent Alarm: This device is designed with a bright 2.8inch TFT color display to show measurement results and supports switching between two interfaces. Equipped with an air quality classification function, this device uses four 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 buzzer alarm function to prompt timely action when necessary. Accurate Detection: It Features a 3D porous housing with multiple ventilation holes to facilitate realtime 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.  Wide Applications: Builtin 1200mAh highcapacity rechargeable lithium battery and equipped with a TypeC charging port ensures longlasting performance suitable for various complex environments. It is versatile and can be widely used in various environments, including homes, greenhouses, camping barbecues, factories, automobiles, etc. Specifications: Name: Air Quality Tester Material: ABS Color: black, white (optional) Battery: 1 * builtin 2500mAh lithium battery (included) Working voltage: 5V Charging mode: 500mAh TypeC interface PM2.5: 0999 ugm³ PM10: 0999 ugm³ HCHO: 09.999 mgm³ TVOC: 09.999 mgm³ Carbon monoxide: 01000 PPM CO2: 05000 PPM AQI: 0500 Temperature: 070 celsius Humidity: 099%RH Item size: 70 * 35 * 90mm 2.76 * 1.38 * 3.54in Item weight: 130g 4.59ounce Package size: 145 * 100 * 48mm 5.71 * 3.94 * 1.89in Package weight: 200g 7.05ounce Packing List: 1 * Air Quality Tester