Features: This air quality detector can detect the CO2, PM2.5, temperature and humidity for you, you can see the data you want. This product is in small size, easy to carry, you can take it to anywhere you want to use it. This detector is suitable for indoor and outdoor air quality, muti-envornmental air quality monitoring for decorations, cars, and so on. With infrared CO2 technology and laser scattering PM2.5 sensor technolology and with temperature and humidity sensor, so you can get the more accurate data. With 24 hours real time monitoring, you can see the data any time you want. Specifications: Material: ABS+metal Color: balck Screen: common screen display PM2.5 detecting range: 0-999 ug/m³ CO2 detecting range: 400-5000 ppm Battery: 1 * lithium battery, 3000mAh (included) Package size: 145 * 97.2 * 78mm / 5.7 * 3.8 * 3.1in Package weight: 525g / 1.2lb Packing list: 1 * Air Quality Monitor 1 * USB Reharging Cable 1 * User Manual