Sennheiser WiCOS Instruction Manual page 5

Danger due to high volumes
These devices are capable of producing sound pressure exceeding
85 dB(A). 85 dB(A) is the sound pressure corresponding to the maximum
permissible volume which is by law (in some countries) allowed to affect
your hearing for the duration of a working day. It is used as a basis
according to the specifications of industrial medicine. Higher volumes or
longer durations can damage your hearing. At higher volumes, the
duration must be shortened in order to prevent hearing damage. The
following are sure signs that you have been subjected to excessive noise
for too long a time:
• You can hear ringing or whistling sounds in your ears.
• You have the impression (even for a short time only) that you can no
longer hear high notes.
Safety instructions for the Lithium-Ion battery pack
If abused or misused, the WiCOS BA battery pack may leak. In extreme
cases, it may even present
• a heat hazard,
• a fire hazard,
• an explosion hazard,
• a smoke or gas hazard.
Please understand that Sennheiser does not accept liability for damage
arising from abuse or misuse.
Keep away from children.
Observe correct polarity.
Dispose of the battery pack
at special collection points or
return it to your specialist
dealer.
Only charge the battery pack
with the appropriate
Sennheiser chargers.
Only charge the battery pack
at ambient temperatures
between 10 °C and 40 °C.
Do not mutilate or dismantle.
Immediately remove the
battery pack from an
obviously defective device.
Only use the original
Sennheiser battery pack.
Important safety instructions
Do not pack charged batteries
loose – danger of shorting
out/fire hazard.
Do not short-circuit.
Switch battery pack-powered
devices off after use.
When not using the battery
pack for extended periods of
time, charge it regularly
(about every 3 months).
Do not heat above 70 °C/
158 °F, e.g. do not expose to
sunlight or throw into a fire.
Do not continue to use a
defective battery pack.
When not using the device
for extended periods of time,
remove the battery pack
from the device.
Do not expose to moisture.
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