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Sennheiser HD 1 In-ear Wireless Owner's Manual

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M2 IEBT 
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Important safety instructions
Intended use/Liability
These In-Ear wireless headphones are designed for use with mobile devices 
(e.g. mobile music players, mobile phones, tablets) that support wireless 
communication via 
Bluetooth. Compatible Bluetooth devices include those 
that support the following profiles: Hands Free Profile (HFP), Advanced Audio 
Distribution Profile (A2DP), and Audio/Video Remote Control Profile (AVRCP).
It is considered improper use when this product is used for any application not 
named in the associated instruction manuals and product guides.
Sennheiser does not accept liability for damage arising from abuse or misuse of 
this product and its attachments/accessories. 
Safety instructions for the Lithium-Polymer battery pack
WARNING
In extreme cases, abuse or misuse of the Lithium-Polymer battery pack can lead 
to:
•  explosion
•  fire development
•  heat generation or
•  smoke or gas development
Dispose of products with built-in rechargeable batteries at special 
collection points or return them to your specialist dealer.
Only use rechargeable batteries and chargers recommended by 
Sennheiser.
Charge products with built-in rechargeable batteries at ambient 
temperatures between 10 and 40°C/50 and 104°F.
Switch battery-powered products off after use.
When not using the product for extended periods of time, charge its 
built-in rechargeable batteries regularly (about every 3 months).
Do not heat above 70°C/158°F, e.g. do not expose to sunlight or 
throw into fire.
Do not charge a product with built-in rechargeable batteries if the 
product is obviously defective.