ynak 16 in 1 air quality monitor indoor 7" large display 9 aqi+7 alerts, co2 monitor air quality tester for co2, tvoc, pm2.5 pm1.0 pm10, hcho temperature humidity aqi & time air quality meter for home 8h standard-white is up for auction in Home & Kitchen. This item is in Good Condition. This auction has ended — similar items appear in live auctions regularly.