Air Quality Monitor/Air Pollution Detector, Indoor&Outdoor [PM2.5 HCHO TVOC Temp. Humidity] USB Charging, Real-Time Air Quality, Historic Data&Charting, IFTTT, LCD, WiFi&Mobile App, Portable

Best money I’ve ever spent period. I got this to monitor VOC levels after we moved to a new place. Then the wildfires hit the Pacific NW a few weeks ago and this became a lifeline for decision making for friends and family.The photo is from outside my home around the peak of the smoke. We used this daily for a couple weeks to figure out how to seal out PM 2.5 aka the small nasty particulates that NEVER leave your lungs. The device is a great deal considering its small form-factor and seems very accurate when tested alongside other monitors.I will say if you’re buying this for the WiFi, which I was not, their software is sketchy and in Chinese.

returning it.The link in the manual and in the device takes you to a chinese web page with no option for changing language, if you have an Iphone you would be able to download the apk, in the case of android the apk comes from a unreliable source, in the process of creating and account and to link you device with your account... you are required to download and register, giving all kind of permissions and consents to WeChat "chinese app:) other app that you need to have in order to link and use the app of your device.So if you dont live in China dont buy this.

I have used this monitor a little more than a month. It works as described. It is simple and accurate. I especially like it’s close to buttonless design, It has just ONE button. I shopped around and saw others has so many buttons! (some are just overwhelming!). This little devise is solidly built, the screen is bright, clean and simple, the interface is friendly. I am pleased with my purchase, also recommended it to a few friends who are senior and sensitive to air quality.

I purchased this a few months ago. As a standalone device, it's good. As an Android user, it only connected to one very old device. Last week it stopped WiFi and is now standalone only. Note, this does not calculate AQI, it reports raw values. Disappointed. I purchased for remote monitoring, and now I can't.

Have used this product about 3 months, really like it: Big and clear screen, high end quality, long battery life, cool/fancy design, smart phone size, accurate reading, and remote monitoring with wi-fi setup. Definately recommend it!

Great portable device and easy to use. Nice friendly app