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

It works and its been more than week and battery still showing two bars and not yet charged. Readings are also correct. Good Product.

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.

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

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!

Too good for domestic and outdoor use. Easy to operate. Value for money.

Note that, the readings displayed on the device is not the actual AQI, just an air quality index as per the other readings. When i purchased this I thought this is showing AQI, but it is not. IT will only show the quality index roughly between 0 to 40 all the time. Although the other readings, PM2.5, HCHO and TVOC are accurate.

Superb! Just what is needed in every home. Sensitive sensor. Accurate readings. Good battery life. Easy to carry around. Thank you Amazon and Smiledrive.