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.

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.

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!

Poor quality.. product stopped working in just 4 months.

Nice product. Gives accurate results.

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.

Overall it is a good product although I feel it fails to capture very high pm2.5 levels, I live in Noida and have never measured more than 250-270 pm2.5 level which was on days much less than government and other public monitors data available online. It works to provide a general range of pollution and has higher accuracy than the in built aqi meters in purifiers. It's a good buy for this budget.

Great build and easy interface. Accurate live readings which I cross checked with air purifier indication. Very portable to carry to any room or place. Long lasting rechargeable battery. 5k is worth the product.