Sennheiser HD 4.50 BTNC Owner's Manual
HD 4.50BTNC
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Using the headphones
Using NoiseGard
The HD 4.50BTNC Wireless headphones provides excellent attenuation of
ambient noise using the
ambient noise using the
NoiseGard Active Noise Cancellation technology.
You can activate or deactivate
NoiseGard if your headphones are connected to
the smartphone using
Bluetooth or the audio cable.
Activating/deactivating NoiseGard when connected via Bluetooth
X
Simultaneously press and hold the Volume +/- buttons.
The LED flashes purple 3 times.
The LED flashes purple 3 times.
NoiseGard toggles between on and off.
Activating/deactivating NoiseGard when the audio cable is used
X
Press the power button.
The LED lights up blue to indicate that
The LED lights up blue to indicate that
NoiseGard is active. NoiseGard toggles
between on and off.