Review on 🌬️ Cheffort Formaldehyde Detector: Precision Temperature & Pollution Monitoring Device by Jeremy May

Pros: * Has the best visual design of any air quality monitor available on Amazon today * Easy to read readings * Long-lasting battery * Can switch between Celsius and Fahrenheit. judging by my Apple Watch). For reference, my refrigerator registers 45 dB. This was quite unexpected as I had planned to use it in the office and couldn't due to the noise pollution. *After a successful double full charge, it refused to fully charge and instead the charge indicator went indefinitely. I tried different USB cables and different transformers but the result is the same. * Sometimes an alarm sounds. This is because one of the metrics crossed an important threshold, but I couldn't figure out on the display which metric, what the threshold is, or what to do about it. This alarm clock is not customizable as I have tried every key combination with no success. The best I can do is temporarily disable the alarm until the next invisible threshold is crossed. * There is a general quality indicator, but it doesn't work until you remember the different safety levels for PM#, HCHO, TVOC and CO2. Only then will you know if the red light means you need to open a window, do a cleaning, or pull out a rag. *As you can see in the picture, my TVOC reading jumped to 9.999 at times and stayed at that level all night. The next morning it miraculously dropped to <0.1 with no windows opening or air purifiers running. I don't see how this can be even remotely accurate.