Product review (5 stars): Worked great for me
I am not a HVAC contractor, I saw this meter and ordered it, because we have a central air unit in our house that sometimes doesn't always work properly. My son knows a little about fixing it, and this meter works great for testing the unit.

I have also used it when my grandson was sick, and I had to use a humidifier in his bedroom to check for temperature and humidity levels. This meter worked great for those purposes. I found it to be pretty quick to read the temperature and humidity levels. I would recommend this meter, but I don't use it for professional purposes.