Voice Control Function - Sennheiser HD 4.50BTNC, HD 4.50R Instruction Manual

Making calls on the headphones
26 | HD 4.50BTNC/HD 4.50R

Voice control function

The voice control function is only supported by Bluetooth smartphones with
HFP profile.
You can use this function when the headphones are not actively playing music
or are used for making calls.
1. Press the multifunction button and hold for 2 seconds.
Press Function
2s
2. Say your voice command, such as "Call Jane".
The Bluetooth smartphone calls Jane.
Starts voice control
Voice prompt
"voice dialing"