Review on 🌍 VIVOSUN Pollution Detector: High-Quality Monitoring Device by Anthony Grover

, but this little brochure doesn't go far enough. There are no answers to some key questions. For example 1) It describes the calibration button "Hold for 3 seconds to restore factory settings”. But doesn't say what the calibration does? or how do you start and end the process? Or how do you know if it's successful? 2) Do label colors matter? Why are the letters "HCHO" red? Elsewhere, red seems to indicate a bad/contaminating substance. As the letters "TVOC" are highlighted in yellow, is this a warning? My guess is that they are that color all the time and don't change based on the readings. It would be better if they were all the same color e.g. B. Black. 3) What do the six bars at the bottom of the screen mean and why are they blinking? What do the numbers from 1 to 6 mean? Do they match the reference table in the manual? Does the color coding of the names somehow match the color coding of these six blocks? (I suspect not, but it's not clear.) What does real-time environment assessment mean? I'm just trying to be constructive and helpful. I suspect that a small addition to the manual would help clarify these issues.