Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) - Manual (Page 21)

Using the headphones
HD 450BT | 21
Listening to music using the headphones
You can listen to music when the headphones and your audio source
are connected via Bluetooth (> 12) or the audio cable (> 25).
Controlling music playback
The following music playback functions are only available when the
headphones and the device are connected via Bluetooth. Some
smartphones or music players may not support all functions.
Playing/pausing music
▷
Press the center of the 3-way multi-function button 1x.
Playing the next track
▷
Slide the 3-way multi-function button backwards.
1x
2s
Hold
1 2
“Power on“
3-way multi-function
button
Function
Press 1x Plays or pauses music
3-way multi-function
button
Function
Slide
backwards Plays the next track in the playlist
Right R