Nokia T20 User Manual page 35

Nokia T20 User Guide
All specifications, features, and other product information provided are subject to change
without notice.
The HMD Global Privacy Policy, available at [http://www.nokia.com/phones/privacy]
(http://www.nokia.com/phones/privacy), applies to your use of the device.
HMD Global Oy is the exclusive licensee of the Nokia brand for phones & tablets. Nokia is a
registered trademark of the Nokia Corporation.
Android, Google and other related marks and logos are trademarks of Google LLC.
The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such
marks by HMD Global is under licence.
Use the Low blue light mode
Blue light is a color in the visible light spectrum that can be seen by the human eye. Of all the
colors that the human eye perceives (violet, indigo, blue, green, yellow, orange, red), blue has
the shortest wavelength and thus produces a higher amount of energy. Since blue light passes
through your eye's cornea and lens before reaching the retina, it may cause itchy and red eyes,
headaches, blurred vision, and poor sleep, for example. To limit and reduce blue light, the
display industry has developed solutions such as the Low blue light mode. To switch on the
Low blue light mode on your tablet, tap Settings > Display > Night Light > Turn on . If you
need to look at your tablet's screen for a long time, take frequent breaks and relax your eyes
by looking at distant objects.
OZO
OZO is a trademark of Nokia Technologies Oy.
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