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Safety information 

 

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The BW 900 system has been manufactured according to the accepted 
rules of safety and current technology. However, there is still a danger of 
damage to equipment if the following general safety instructions are not 
complied with. 
•  Read these instructions completely before working with the BW 900 

system. 

•  Keep these instructions in a location where they are accessible to all 

users at all times. 

•  Always include the operating instructions when you pass the BW 900 

system on to third parties. 

The BW 900 system is an accessory for fixed line phones, and Bluetooth-
enabled devices such as mobile phones, PCs and PDAs, allowing for wire-
less communication in office and home office applications. 

It is considered improper use when the BW 900 system 
•  is used for any application not named in these instructions, 
•  is used under operating conditions that deviate from those described 

in these instructions. 

•  Never disassemble or modify components of the BW 900 system. The 

right to disassemble or modify is reserved to authorized personnel. 
This applies especially to all units connected to AC outlets. If units are 
opened by customers in breach of this instruction, the warranty be-
comes null and void. 

•  The rechargeable battery used in this device may present a fire or 

chemical burn hazard if mistreated. Therefore, do not disassemble, 
heat above 100°C (212°F) or incinerate the battery. 

•  Sennheiser Communications is not liable for damages resulting from 

the loss of connection. 

 

•  Use the BW 900 system in dry places only and keep liquids and small 

electrically conductive parts away from the BW 900 system and its 
connecting sockets. 

 

•  Set up the unit on an even surface and lay the cables in such a way 

that nobody can pull the BW 900 system or your phone from the table 
by accident. 

 

•  This equipment generates, uses and can radiate radio frequency en-

ergy and, if not installed and used in accordance with the instructions, 
may cause harmful interference to radio communications. However, 
there is no guarantee that interference will not occur in a particular in-
stallation. 

•  When you are not using your headset, place it in the base station cra-

dle to recharge its battery. 

•  The rechargeable headset battery must be charged in the BW 900 

base station, only! Never try to charge batteries other than those 
specified for use with the BW 900 headset in the base station! 

•  Only to be used with Sennheiser Communications supplied approved 

and certified power supply (EU 094707, UK 092892, US 092893, AUS 
520334). 

 

 

General instructions 

Before assembly 

During assembly 

During operation