Sennheiser HD 4.50 BTNC Owner's Manual

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HD 4.50BTNC

Making calls on the headphones 

Making calls on the headphones 

The following call functions are only available if the headphones and smartphone 
are connected via 

Bluetooth. Some smartphones may not support all functions.

Making a call

 

X

Dial the desired number on your smartphone.

If your smartphone does not automatically transfer the call to the 
headphones, select the HD 4.50BTNC Wireless as the audio source 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 and the LED flashes blue. If the battery life 
of the headphones is low, the LED flashes red.

If you are playing music when you receive a call, the music pauses until you end 
the call. 

 

X

Press or push the multifunction button accordingly:

Press

Function

Voice prompt

1x

Accepts a call

 

Ends a call

2

HOLD

1

Accepts an incoming 
call and holds the 
active call

2s

Rejects a call

2

1

Rejects an incoming 
call and continues the 
active call

2x

HOLD

Puts the call

 

on hold

2

1

Accepts an incoming 
call and ends the 
active call

HOLD

2

1

Toggles between 
2 active calls