User manual

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6. Button K4：for adjusting speaker volume down
7. Microphone：for picking up your voice
8. Charging Port：for connecting to the travel (or car) charger to charge the battery of
device
1.6 Definitions on Key Press Duration
z Short press (SP): press and release a button quickly.
z Long press (LP): press and hold a button for at least 3 seconds, then release.
z Very long press (VP): press and hold a button for at least 6 seconds, then release.