Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) - Manual (Page 25)

Using the headphones
HD 450BT | 25
Connecting the headphones using the
audio cable
1. Insert the 2.5 mm jack plug of the audio cable straight into the
headphones' audio socket until you feel a resistance.
2. Turn the 2.5 mm jack plug to the right until you feel a resistance.
The jack plug is now locked in place and the audio cable is cor-
rectly connected to the headphones.
3. Insert the 3.5 mm jack plug of the audio cable into the audio
output of your smartphone.
The Bluetooth wireless connection is deactivated.
Disconnecting the audio cable from headphones
1. Turn the 2.5 mm jack plug of the audio cable to the left until you
feel a resistance.
2. Pull the 2.5 mm jack plug straight out of the headphones' audio
socket.
3. Pull the 3.5 mm jack plug of the audio cable straight out of the
audio output of your smartphone.
OFF
Right R
Audio cable
2.5 mm
3.5 mm