18-in-1 Smart Air Quality Monitor, WiFi Indoor Air Detector with Dual Chip, Real-Time Monitoring for AQI, CO2, PM2.5, PM1.0, PM10, TVOC, HCHO, Time, Temperature and Humidity with APP

This is my second air quality monitor. I bought the previous one 6 months ago and it does not monitor as many pollutants as this monitor. This machine monitors PM 2.5 which my other monitor does not cover. This air quality monitor is easy to set up and operate. It runs itself after you set it up. The large led display is easy to see especially with the color code. I can glance at it and know the air quality right away. When the pollutant exceeds a threshold, It will sound an alarm to alert me. I tested it with cigarette smoke and it worked well. Real time monitoring and operate via the App

This unit is built well and feels like quality plastics were used. It monitors the air really well with a tiny fan inside to move air across it's sensors and I have bought 3 more for my fam to use in their houses. So that's 4 of these exact ones that i can personally speak to. One I have running for almost 4 months 24/7 and the 3 I bought I had running for 3 weeks before giving them away. I own 2 trusted other brand air monitors that I look to as a control group for testing. The 1 I own and 3 others all read the same correct values and react correctly to breath and particle mater testing, and having a neighbor blow smoke into them sends them into a orange and then red parameter level quickly. Great functions like audio alarm and HCHO and TVOC monitoring for volatile organic compounds (building materials, cleaning products, foams/carpets, paints and various smoke) is great! The Co2 monitoring is probably the most useful day to day reading to watch as it shows the build-up of of the gas we all breath out. Co2 at my huose is always highest in the mornings after sleeping, a good reminder to open windows and bring in fresh air. The app is user friendly and easy yo install but not needed for anything but screen auto-brightnes, wich is unavailable without the app. The daily operation and usability is unaffected by not having the app. Lays flat, can be wall mounted or stands vertically easily. Battery lasts about 5.5 to 6 hrs with the screen constantly on, or can be left plugged in. My experiences have bein excellent with this company's air monitoring products, I have 2 of their hand held units also and they too test well. Great value for what it costs vs what it does.

I so wanted these to work. And yet here I am, giving the first one star review I've ever given-- and feeling bad I could not select zero starts. I was hopeful when it arrived and was pretty easy to set up. I started watching the numbers... and placed it on the counter so I could see what was going on. It very quickly started sounding alarms for CO2, but I remembered it takes 24 hours to calibrate itself. The next morning it still showed CO2 beyond the red levels. So I put it outside in the fresh air. CO2 normalized somewhat, down to low 400's. Brought it back inside, and alarms sounded. It was literally still in my hand, only steps inside the door. Mind you this is a house with living people and pets-- so probably not really at 1500+ CO2. After multiple attempts I figured I got a bad unit and set up a return. I still wanted it to work, so I had a replacement sent. It arrived and I had the idea to run them side by side. I kept records of Unit 1 and Unit 2 over a few days. Unit 1 continued to alert me with crazy high CO2, HCHO and TVOC. I powered the units off, restarted, took them outside-- I tried to give them a chance to prove themselves. Unit 1 always had higher CO2 than Unit 2-- usually by about 400 points. Neither unit ever went below 400 for CO2 even when outside. On the 3rd day, Unit 2 wigged out and was 300 points higher on CO2, 8x higher on HCHO, and about 15% higher on TVOC-- while they were on the counter about an inch apart. Probably should note they were also always 1-2 pts different on temperature and humidity. Similarly the two units were always about 2 pts different on AQI, and 102 pts different on PM2.5. I wondered if CO2 was just not working at all-- so as a test I exhaled 3x on each one. Both responded by increasing the readings, then gradually normalizing. So some part of it's working. The units just register numbers 300-400+ different under almost all circumstances. Unit 1 continued to sporadically show alarms level readings for TVO when Unit 2 would show 0. By the fifth day, having recorded measurements many many times a day I realized there was no way to trust the functionality of either unit. It does not measure air quality, or any of the components satisfactorily. There is NO value in this product. This product has not been adequately tested and it's a disservice to be sending them out to people who need or want to know about their air!

I'm so glad I went with this air quality monitor. It's very sensitive and picks up someone lighting a cigarette within seconds. I have a three level home and I tested it in all three as well as outside and it gave me different reading quickly. I ordered better quality air filters the same time as I did the monitor but the monitor arrived the day before. Around two hrs after I installed the new filters I was able to visually see the difference they made in my home on the graph on the app. The app is free to use and doesn't need a subscription & has the option to add smart devices. The quality is outstanding for the price considering how sensitive it is and I now know that my homes air was definitely contributing to everyone getting sick so often as well as getting random sore throats. I have 4 small children in my home and three are babies. The air quality in my home was very dangerous for them and I didn't even know until I purchased this monitor. It works and is very easy to set up. I can't say enough good things about it. I'm so glad I decided on this one.

The device appears to function properly. Set up was easy. It would be nice if its accompanying Mobile app provided definitions of the acronyms displayed. I keep it plugged in to avoid the low battery issue cited in other reviews.

Its not 18 sensor Smart Air Quality Monitor. The product itself is good but the seller claims date and time displayed is in that 18. Its at best 10 air quality parameters. My issue was there are products at half the price with 10 quality parameters.

Clean display with lots of info. I like that I can check the levels while away and receive alerts to my phone as well. I do a lot of work in my garage and it’s nice to monitor air quality levels since so much time is spent there but I can see this also being helpful in a nursery or basement.

I don't know what is going on with this thing, but the levels it gives just can't be correct. I tried putting it in the middle of the room and the levels started getting slightly better, but then they'd spike again, like a wall of gasses just traveled through my living room ala the Nexus in Star Trek Generations. Also it wouldn't stay connected to wi-fi. Returning and buying myself a parakeet.