When low battery icon is displayed, the device needs to be
charged. Insert the included or another compatible micro
USB charging cable into the device. Attach the other end to
a USB DC charger (such as a smartphone charger) that
outputs DC 5V at >=1000mA. Fully charge for at least 2-3
hours before use. Avoid charging with a USB computer port
which only outputs 500mA.
About Charging
AQI level reference table:
Air Quality Standard
Formaldehyde standard reference table:
AQI:Level
PM2.5 standard reference table :
AQI quality index pollution level corlor
AQI:1 0-50 excellent green
AQI:2 51-100 good yellow
AQI:3 101-150 mild pollution orange
AQI:4 151-200 moderately pollution red
AQI:5 201-300 severe pollution purple
AQI:6 above 300 serious pollution maroon
0- 60 Excellent
61-120 Good
121-999 Poor
PM2.5
07
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