This upgrade multifunctional detector can not only detect the CO2 for you, but also can detect the CO, HCHO, TVOC and AQI for you, you can use this tool to get the data you want, and you don't have to buy the one function measuring tool again, come on and have a try, it will not let you down. Features: Adopt LED display screen, the values displayed are more legible and can be read quickly by the elderly and children. This product is in small size, so you can carry it with you to anywhere you want to use it. A wide application: you can use this product for home air detect, car air detect, office air detect and so on. This product can not only detect the CO2 for you,but also can detect the CO, HCHO, TVOC and AQI for you, which can give you the data that you care about. Using independent sensors for different detection objects makes the detection results more accurate, and the air duct design can fully contact the air, making the measurement more accurate. Specifications: Material: ABS Application technology: natural air flows detection technology Display mode: LED Working voltage: 5V Battery: 1 * lithium battery, 850mAh (included) Package size: 177 * 87 * 37mm / 7.0 * 3.4 * 1.5in Package weight: 236g / 8.3ounce Packing list: 1 * Air Quality Detector 1 * USB Cable