Samsung LS20HANKBHDZS - Manual (Page 10)

Do not install the product in a location low enough for children to reach.
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Otherwise, it may fall and result in personal injury.
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Since the front part of the product is heavy, install the product on a level and
stable surface.
Do not put any heavy objects on the product.
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This may result in personal injury and/or damage to the product.
Good Postures When Using the Monitor
When using the product, use it in the correct position.
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Keep your back straight while looking at the product.
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The distance between your eyes and the screen should be between
45 to 50 cm. Look at the screen from a slightly higher location than
the height of the screen.
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When using the product, use it in the correct position.
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Adjust the angle so that light is not reflected on the screen.
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Place your arms perpendicular to your sides and allow your arms to
be level with the back of the hand.
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Keep your elbow at 90 degrees.
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Keep your knees at greater than 90 degrees, and keep your heels
firmly on the floor. Keep your arms lower than your heart.