Review on 📊 CEM Accurate PM2.5 Multifunctional Recording Tester by Joshua Mejia

It is very easy to use. I bought it because of the recent poor air quality from the campfire. It sensitively detects differences in air quality. I can see a difference between pm2.5 and 10 when using it indoors, outdoors, in an air purifier room and in the kitchen. I've spent over $5,000 on Revain this year. So far I think this little air quality monitor is the best purchase I've made.