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.

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.

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

Why my door was closed and the purifier was running then my purifier showed PM 2.5 as 5 and this device as 4. After opening the door within 30 sec the air purifier’s reading raised to 71 and this device showed 11. I thought I might need to recalibrate this again. So I wasted 15 mins again and it was still the same. This is a complete waste of a product. Probably a scam too :( Note: I replaced my initial unit and still faced the same issue.

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.

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!

It is simple and perfectly does its job. Bit fragile, so carry carefully.

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