3
Important safety information
– Before putting the product into operation, please observe the respec-
tive country-specific regulations!
–not covered or exposed to direct sunlight for longer periods of
time in order to prevent heat accumulation (see “Specifications” on
page 37).
• Do not operate the product near any heat sources.
• Only use attachments/accessories specified by Sennheiser Communi-
cations (see “Accessories” on page 36).
• Keep plastic wrap and plastic bags of the packaging as well as accesso-
ries and small parts out of reach of children – danger of suffocation!
Intended use
Intended use of the product includes
• having read this instruction manual, especially the chapter “Important
safety information” on page 2,
• using the product within the operating conditions and limitations
described in this instruction manual.
“Improper use” means using the product other than as described in this
instruction manual, or under operating conditions which differ from those
described herein.
Safety instructions for the Lithium-Polymer rechargeable batteries
The DW 20 HS/DW 30 HS headset has a Lithium Polymer rechargeable
battery. If abused or misused, rechargeable batteries may leak. In extreme
cases, rechargeable batteries may even present
Please understand that Sennheiser Communications does not accept
liability for damage arising from abuse or misuse.
WARNING • a heat hazard,
•a fire hazard,
• an explosion hazard,
• a smoke or gas hazard.
Keep away from children. Do not short-circuit.
Do not expose to moisture. Do not heat above +45°C/
+113°F, e.g. do not expose to
sunlight or throw into a fire.
Do not mutilate or dismantle. Do not charge the rechargeable
battery if the device is obviously
defective.
Only charge rechargeable
batteries at ambient tempera-
tures between +5°C/+41°F to
+45°C/+113°F.
Only charge rechargeable
batteries with an appropriate
Sennheiser Communications
charger.
When not using rechargeable
batteries for extended periods
of time, charge them regularly
(every six months for about one
hour).
Store in a cool and dry place
at room temperature (approx.
20°C/68°F).
Return defective devices or devices with defective rechargeable batteries
to your specialist dealer.
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