Review on 🌬️ YVELINES Air Quality Monitor: CO2, Formaldehyde(HCHO), TVOC, PM2.5/PM10 Detector with Real-Time Data & Mean Value Recording - Ideal for Home and Office by Hayden Hart

I am very concerned about the air quality in my home where I have air purifiers in every room of the house. My air purifiers are very high quality and do a great job, but I always check them daily to make sure. I've found where all the readings are known and easy to find, safe areas on the internet where it sits on my bedside table and just looks good there. I have a more expensive laptop and that goes with it, plus the reviews of my air purifier app, good to know too. Very easy to use, fairly fast once calibrated and very easy to see day and night. It's fun to turn off the air purifier and see the numbers change after about an hour. It's nice to know the space is safe and that my air purifiers are working as they should. No cons, works great, very happy with the purchase.