User`s manual

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4.5 Beep & Vibration
4.5.1 Beep
By scan below bar code to adjust beep volume. Default: Medium volume
4.5.1.1 High volume
High Volume
4.5.1.2 Medium volume *
Medium Volume*
4.5.1.3 Low volume
Low Volume
4.5.1.4 Mute
Mute