Zte Axon 40 Ultra Quick Start Manual page 11

Lowering Blue Light
Blue light with wavelengths between 415 nm and 455
nm is considered harmful for the eyes. It may cause eye
discomfort, suppress melatonin, and affect sleep quality
and circadian rhythm. This product has the function of
reducing blue radiant energy.
To avoid eye fatigue, it is recommended to place the
product at an appropriate distance from your eyes and rest
for 20 minutes to look into the distance after two hours of
continuous viewing.
To enable eye protection, open the Settings app and
touch Display > Night Light > Turn on now. Use Turn on
automatically to enable eye protection between sunset
and sunrise or during customized time. In addition, you can
adjust the protection effect by changing the blue light filter
and white point reduction levels.
Product Safety Information
Don't make or receive phone calls while
driving. Never text while driving.
Keep your phone at least 10 mm away from
your body while making calls.
Small parts may cause choking.
Your phone can produce a loud sound.
To prevent possible hearing damage, do not
listen at high volume levels for long periods.
Exercise caution when holding your phone
near your ear while the loudspeaker is in use.
Avoid contact with anything magnetic.
Keep away from pacemakers and other
electronic medical devices.
Turn off when asked to in hospitals and
medical facilities.
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