Thank you for selecting ZG1683RU desktop CO2 monitor, ZG1683RU CO2 monitor is smart, compact and easy-to-use. In addition to measuring 

the CO2 concentration, ZG1683RU can also measure the ambient temperature and the relative humidity (CO2+Temp. +RH). This product is 

developed to detect the presence of CO2 in ambient air and help people to take care of Indoor Air Quality. ZG1683RU can be widely used in the 

office building, school, exhibition hall, shopping mall, meeting room, fitness center, restaurant and other public places where personal comfort, 

healthy is important.