Bests & Worsts Reviews from Amazon

Good things: - Pretty quiet to operate considering there's a built-in fan - Easy to set up through Alexa app, you just scan the bar code on the bottom of device with an app - Works with Echo speakers/devices so if you have one - you can just ask about things like indoor temperature or air quality using your voice Bad things: - The measurement range for things like humidity and temperature is too low. Yes, I had days when humidity was over 90% in the living room and the temperature was over 104F. No, this monitor cannot measure such high values. - The CO sensor is practically useless. It's useless as CO alarm (it's not even certified to be used as such), you should have a dedicated CO alarm detector anyway which we already have on each floor. CO2 sensor would've been much more useful since I've seen situations when CO2 going significantly up in rooms with poor ventilation, causing issues like headache and fatigue, with CO staying in safe ranges. Many other air quality detectors have CO2 sensors for this reason. - There is no standalone app to use specifically for this monitor, you must use Amazon Alexa app if you want to see visual representation of the data, and Alexa app has a lot of useless features and asks for too many permissions and I don't like using it for anything. The Alexa app doesn't even have a widget specifically for this monitor, not even a tiny 1x1 widget. And yes, I do like using widgets on my Android phone. - There is an initial calibration which takes few minutes each time you disconnect the monitor from power supply. It's pretty annoying to wait that much each time you want to move it to different location. There is no battery of any kind inside to compensate for things like brief power loss or to be used as a portable detector. - The power connector on device is microUSB, so you can't reuse any of your existing power cables with USB-C if you will ever need to use longer cable or if the included cable will go bad, you will have to buy extra cable with microUSB connector. Edit: forgot to add most important part. Right now (as of the day of this review) the Amazon Echo devices cannot notify you with voice about changes in air quality in a meaningful way when paired to this monitor. Same goes for Amazon Alexa app. For example, I have another air quality monitor by different brand (I won't tell which one, it doesn't matter), and it has an app which displays instant notification on my Android phone, for example "The VOCs are increasing", with specific level of VOCs, then when VOCs decrease to safe level - it displays another notification about that, with detailed numerical values. Current version of Amazon Alexa app cannot display such notifications for this monitor. Amazon Echo devices also do not notify you through voice with a warning like "Your level of VOCs are increasing" or "Your level of PM has reached unsafe levels". I can't believe Amazon didn't bother to add such simple things before releasing this monitor.