Sennheiser Momentum HD1 Free Instruction Manual page 18

Getting started
16 | M2 IEBT SW
Disconnecting the headphones from your Bluetooth device
Deactivate Bluetooth on your smartphone.
X
The headphones are disconnected from the smartphone. The
headphones then search for other paired devices. If no device is found,
you hear the voice prompt "lost connection". The headphones go to idle
mode.
Menu
Bluetooth on
Bluetooth off
› lost connection ‹