Review on 🌬️ Hofun Professional Air Quality Monitoring Device by Elton Luo

I used this air quality meter to test an air purifier. I found this air quality monitor could tell the difference in air quality next to the air purifier and beyond. So this is pretty useful for relative measurements. I find that warming up takes a long time. Also, the original system settings automatically turn off the device after 10 minutes, which doesn't make much sense since it takes a long time to preheat. Luckily, you can change the auto-off time to 30 minutes or never in System Preferences. Finally, there are two UI settings: Default UI and WIN10 UI. I recommend using the WIN10 interface, it's easier to read.