Faq/if a problem occurs, Leaving the bluetooth transmission range – Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) User Manual
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FAQ/If a problem occurs ...
HD 450BT | 29
FAQ/If a problem occurs ...
Current list of frequently asked questions (FAQ)
Visit the HD 450BT product page at
There you will find a current list of frequently asked questions (FAQ)
and suggested solutions.
Your question has not been answered or the problem persists?
If a problem occurs that is not listed in the FAQ section or if the prob-
lem cannot be solved with the proposed solutions, please contact
your Sennheiser partner for assistance.
To find a Sennheiser partner in your country, search at
rvice & Support”.
Leaving the Bluetooth transmission range
Wireless calling and streaming are only possible in the Bluetooth
transmission range of your smartphone. The transmission range
largely depends on environmental conditions such as wall thickness,
wall composition etc. With a free line of sight, the transmission
range of most smartphones and Bluetooth devices is up to 10 meters.
If you, and therefore the headphones, leave the Bluetooth transmis-
sion range of the smartphone, the sound quality deteriorates
increasingly until you hear the voice prompt “Lost connection” and
the connection breaks down completely. If you immediately re-enter
the Bluetooth transmission range, the connection is automatically
re-established.
Deleting the Bluetooth pairing list of the headphones
Make sure that Bluetooth is deactivated on the headphones.
1. Restart the headphones by switching them off and on again (> 17
and 16).
2. Simultaneously press and hold the on/off button and the 3-way
multi-function button for 5 seconds.
The LED flashes purple. The headphones then stay in Bluetooth
pairing mode.
1
2
OFF
2s
Hold
4s
Hold
ON
5s
Hold
ON
“Pairing“