Attention! High volume!
Even short exposure to high volume levels will damage your hearing!
Set the volume for the connected headphones to the minimum before putting the headphones on.
First, use the / rocker button to set the volume for the connected headphones to the minimum. Then gradually increase the volume.
Volume up? – NO!
When people use headphones, they tend to choose a 
highervolumethanwithloudspeakers.Listeningat high volume levels for long periods can lead to permanent hearing defects. Please protectyour hearing, Sennheiser headphones havean excellentsoundquality evenat low volumes.
Activating/deactivating the lock mode
The receiver has a lock mode that can be activated or deactivated via the operating menu (see “Activating/ deactivating the lock mode” on page25). The lock mode prevents that the receiver is accidentally programmed or switched off during operation.
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