Samsung Q1B - Manual (Page 12)

Maintaining a Proper Posture While Using the Computer 12
Volume Control (Headphones and Speakers)
Check the volume level before listening to music.
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Check if the volume level is too high before using the headphones.
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Do not set the volume to the maximum from the beginning. Set the volume low and find a
comfortable level while turning it up.
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Do not use the headphones for long periods of time.
Usage Time (Break Time)
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When working for more than one hour, take a 10 minute break after every 50 minutes of work.
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Using this computer for two hours or less a day is recommended.
Illumination
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Do not use the computer in a dark environment. The illumination level for computer use must
be as bright so when reading a boo.
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Indirect illumination is recommended. Use a curtain to prevent the reflection of the LCD screen.
Operating Conditions
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Do not use the computer in hot and humid locations.
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Use the computer within the allowed temperature and humidity ranges specified in the User
Guide.