Air Quality Monitor Upgraded Tester for CO2 Formaldehyde TVOC /AQI/ Multifunctional Air Gas Detector Features: Know Your AirThis upgraded indoor air quality monitor built in DART electrochemical sensors that can accurate detect air of Carbon Dioxide(CO2), Formaldehyde(HCHO), Volatile Organic Compound(TVOC), Particle Matter(AQI). Those readings involve detection of toluene, harmful chemical substances and pollutants in the air. 2021 Newly Design2021 Newly design placement air monitor built with LCD Color Screen Digital Display. Newest unique mold and design with LCD Color Screen Digital Display; it can offer mean value for each gas because long-term monitoring, the real-time data exist instability. USB Charging&Long standbyYou can charge the product with USB.Built-in 1000mAh battery, energy saving and environmental protection, 240 minutes long standby time. Your Health Aistant CO2 /Formaldehyde /TVOC and AQI real time gas monitoring to prevent any respiratory disease. It's easy to carry the intelligent air quality monitor that can help us detect the gas air pollution in household, kitchen, bedroom, office, school, car, hotel, travel, camping, party etc...especially in which has baby,child and pregnant woman. Warm NotePlease be aware this air quality monitor is for home indoor place. We do recommend using the monitor as a stationary unit and focus on 30 and 60 minute mean values .and overall environment quality indication because long-term monitoring, the real- time data exist instability. If you have any questions regarding monitor functionality or you need any aistance on how to re-calibrate the sensors, Please contact us. Specification: Material: plastic Display mode: LED Measurement Accuracy: 0.1 Measurement Object: gas Package Includes: 1 Pcs Air Quality Monitor note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!