Sennheiser HD 450SE Instruction Manual page 23

Using the headphones
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 450SE" 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
Press 1x
Hold for 2
sec
Press 2x
Hold for 2
sec
Press 1x
Right R
Accepts a call
Ends a call
Voice prompt "Call ended"
Rejects a call
Voice prompt "Call rejected"
Redialing
Voice prompt "Redial"
(only when music playback is NOT
active)
Continues the active call and rejects
an incoming call
Puts the active call on hold and
accepts an incoming call
HD 450SE | 23