Review on GZAIR Temperature Relative Humidity Monitor: Accurate Readings from 0 to 9999PPM by Jeremy Meza

This arrived when we were on vacation and my co-workers were having trouble getting it to work but my husband came to the rescue. When we came back from vacation, he started this device as soon as possible. It was accurate and quick for reading vibrations in the air. We use it in our bar in accordance with our "Governor's Order" 🙄. Overall a great product.