Sennheiser MB 660 Instruction Manual page 30

Setting the MB 660 to flight mode
Using the headset in flight mode
1. Insert the 2.5 mm jack plug into the audio input of the headset.
Bluetooth is deactivated.
If you are playing music on the headset using Bluetooth and the audio
cable is plugged in, Bluetooth is deactivated and the music stops.
2. Connect the 3.5 mm jack plug to:
– the audio output of your smartphone
– the in-flight adapter if you want to use the headset with an IFE system
CAUTION
Bluetooth may transmit radio waves when the audio cable is pulled off!
Only use the product in environments where Bluetooth wireless
transmission is permitted.
Deactivate Bluetooth on the headset (see page 28), to ensure
X
that the headset does not transmit radio waves when the audio
cable is unplugged.
You can also play higher resolution music when in flight mode by
connecting your headset to your computer using the supplied USB
cable. If you use the USB cable to listen to music in environments where
Bluetooth wireless transmission is restricted, you have to deactivate
Bluetooth on all devices.
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