Features: The Air Quality Monitor delivers comprehensive detection of PM2.5, CO2, and other harmful substances with real time tracking and alarm alerts for immediate air safety awareness. Equipped with high sensitivity sensors and a rechargeable battery, this portable device features USB C charging and continuous 30 day operate for indoor air analysis. Ideal for families, office professional, and parents seeking to guard children play areas from invisible threats. Effortlessly monitor air quality in living rooms, vehicles, workshops, or childcare spaces using its compact design and multi scenario adaptability. Combines connectivity with advanced sensors technology to provide lab grade accuracy in detecting CO2, TVOC, and HCHO levels for proactive environmental management. Specifications: Component: ABS, electronic components Working Temperature: 0-70℃ Screen: 2.8in Working Voltages: 5V Size: about. 7x9x4cm/2.76x3.54x1.57in Properties: White/Black Package Includes: 1pc Air Quality Monitor note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.