Optimus CTR-116 User Manual
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• Set the volume to its lowest level before you begin listen-
ing. After you put on the earphone, adjust the volume to a
comfortable listening level.
• Do not increase the volume once you have established a
comfortable listening level. Over time, your ears adapt to
the volume level, so a volume level that does not cause
discomfort might still damage your hearing.
Traffic Safety
Do not wear the earphone while operating a motor vehicle or
riding a bicycle. This can create a traffic hazard and could be il-
legal in some areas.
Even though some earphones let you hear some outside
sounds when listening at normal volume levels, they still can
present a traffic hazard.
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