SMILEDRIVE® Portable Air Quality Pollution Monitor Meter with Colour Graphic Display|AQI, PM 2.5/1/10, TVOC, HCHO, Temperature, Humidity|Use Indoor Outdoor in Home, School, Office, Hospital, Anywhere

Amazing product. Very accurate in AQI measurements. When you buy this, you realize how hard your air purifier is actually working. Brought down AQI from 300 to 18 within an hour. Easy to Use. Gives measurement on many metrics: AQI, PM10, PM2.5, PM1, TVOC, HCHO, Temperature and Humidity.

Working as expected. For Ambient Air Pollution checking, this is the best device in my opinion. Read some reviews where reviewers try and match with public data- what is the point in buying this device then??! Registered warranty online and got instant confirmation on email. UPDATE AFTER TWO WEEK USAGE Kept air purifier off in bedroom and the Air Pollution level climbed to an Alarming 340. Overnight purifier kept on and the level came down to 116. Battery holding up good. Kids in the house getting super excited!

I have used this product for 24 hours. It is a good indicator of the pollution level. I check at various locations and with air purifiers on and off. And it is able to give a good reading. It was also very easy to use with all data available on a single threshold. I am still to use the logging functionality and it could be handy to monitor levels over a period. It feels good to hold in the hand and it is quite portable. My only qualm is with the battery life and charging. It has a USB C port but it doesn't work with all cables. You need to use the cable in the box only to charge it. And there's a specific instruction in the box, to not to use it with fast chargers. Which is a challenge, because you can't always figure out whether a charge is a fast charger or not. Even after charging, the battery life is quite short. Would have been great to have replaceable batteries instead.

Product seems ok but seller sent me used and duaty device. Amazon must look into it.

VFM - Value for money Does what it claims. Helping me to take informed decisions. Using indoor and outdoor and in car. AQI, AQI level, colour coding, the particulate matters- all visible at one glance.

Looks rigid. Easy to use interface. Readings are surprisingly accurate. Please do calibrate the device as per instructions for the accuracy. Will use more and update. So far so good.

good to keep track or polution levels in your environment.

Product accuracy is greatest of all the aqi meter I have seen only the issue is battery backup.