ViewSonic M2W User Manual page 69

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Light Source Level
High Altitude Mode
Select the suitable power consumption of the LED.
Full
100%
Eco
70%
NOTE: If using a USB-C connected power bank
to charge the M2W, the light source level
will only have Full (60%).
It is recommended that you use High Altitude
Mode when your environment is between 1,500-
3,000 m above sea level, and a temperature
between 5°C-25°C.
NOTE: If you use this projector under other
extreme conditions excluding the
above, it may display auto shut-down
symptoms, which is designed to protect
your projector from over-heating. In
cases like this, you should switch to High
Altitude Mode to solve these symptoms.
However, this is not to state that this
projector can operate under any and all
harsh or extreme conditions.
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Description