Tvoc, hcho, co2, aqi powered by rechargeable lithium battery, the air quality monitor makes it easy to take measurements from one room to another in order to get an overview of the air quality in a home, workplace, school or any other location. the air quality monitor is also an essential tool use when performing property inspections or when using any household tools to see if there is any abnormal amount of toxin release. intelligent detection of various types of gas. most household gas can be detected, no need to worry about the applicability. the measurement is displayed on a high definition screen, small and light design for easy carrying. natural air flow detection technology is adopted to determine air quality problems more accurately. built-in polymer battery, energy saving and environmental protection