Bluetooth Headset BH 904 - Sliding boom

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Sliding boom

The sliding boom brings the
microphone closer to your mouth,
which improves the audio quality
when you talk at a lower volume or in

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a noisy environment. You can use the
boom to answer or end a call.

To use the boom, gently pull it down
toward your mouth (14), or push it up
to its initial position (15).