Graootoly Temperature & Humidity Meter, Air Quality Monitor, CO2 Detector, 3-In-1 Digital Air Pollution Carbon Dioxide Detector A

EASY TO OPERATE: long press the "on-off" key for 3 seconds . The product does not need calibration, startup can be tested COLOR SCREEN: the carbon dioxide data, temperature and humidity. The colored ring will change according to the carbon dioxide content. BATTERY SUPPLY: -in 1200mAh lithium battery, use TYPE-C charging cable to charge it. 3-IN-1: Can function as a carbon dioxide concentration detection, thermometer and hygrometer at the same time. COMPACT AND PORTABLE: can take in the kitchen, living room, bedroom, or when going out. Widely used and practical, used for epidemic preventions and control to detect the CO2 concentration in the population, so as to control the number of people and avoids the risk of -infection.