10BS--Mute--The microphone does not work , can't be heard.

First of all, make sure the Mute function is off which on the side and the LED will show RED if the Mute function is on.

Second, try to reset it by following steps:

1. Press and hold both V+ and V- for about 12 seconds until the LED flashes blue and red, then release the buttons.

2. Power off 10BP. After being powered on again, it will enter pairing mode automatically.

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