Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) - Manual (Page 23)

Using the headphones
HD 450BT | 23
Making phone calls using the headphones
The following call functions are only available when the headphones
and smartphone are connected via Bluetooth. Some smartphones or
communication apps may not support all functions.
Making a call
▷
Dial the desired number on your smartphone.
If your smartphone does not automatically transfer the call to the
headphones, select “HD 450BT” as the output device on your
smartphone (see the instruction manual of your smartphone if
necessary).
Accepting/rejecting/ending a call
If your headphones are connected to a smartphone and you receive
a call, you hear a ring tone in the headphones.
If you are playing music when you receive a call, the music pauses
until you end the call.
3-way multi-function button Function
Press 1x
Accepts a call
Press 1x Ends a call
Voice prompt “Call ended”
Hold for 2
sec
Rejects a call
Voice prompt “Call rejected”
Hold for 2
sec
Continues the active call and rejects
an incoming call
Press 1x Puts the active call on hold and
accepts an incoming call
Press 2x Ends the active call and accepts an
incoming call
Press 2x Toggles between active call and call
on hold
Right R