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Important safety instructions
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HD 4.40BT
Important safety instructions
Read this instruction manual carefully and completely before using the
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product.
Always include this instruction manual when passing the product on to third
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parties.
Do not use an obviously defective product.
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Only use the product in environments where Bluetooth® wireless transmission
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is permitted.
Preventing damage to health and accidents
Protect your hearing from high volume levels. Permanent hearing
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damage may occur when headphones are used at high volume
levels for long periods of time. Sennheiser headphones sound exceptionally
good at low and medium volume levels.
Keep the headphones at least 10 cm/3.94" from cardiac pacemakers or
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implanted defibrillators. The headphones contain magnets that generate a
magnetic field which could cause interference with cardiac pacemakers and
implanted defibrillators.
Keep the product, accessories and packaging parts out of reach of children
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and pets to prevent accidents and choking hazards.
Do not use the product in situations which require special attention (e.g. in
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traffic or when performing skilled jobs).
Preventing damage to the product and malfunctions
Always keep the product dry and do not expose it to extreme temperatures
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to avoid corrosion or deformation. The normal operating temperature is from
10 to 40°C/50 to 104°F.
Only use attachments/accessories/spare parts supplied or recommended by
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Sennheiser.
Clean the product only with a soft, dry cloth.
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Use the product with care and store it in a clean, dust-free environment.
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