We're big fans of this seemingly benign option because it combines the physical gesture of turning the sound source away from you with the software response of switching all audio off.

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On the right edge, you'll notice a volume jog dial for incoming chat audio and a backlit button for switching between speaker and headset mode.

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These will include charging and audio quality improvements, as well as improved display switching in bright light.

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Four buttons with infrared sensors on the rotary controller allow switching between different menus, such as audio, apps, communications and navigation.

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