SENA Bluetooth Mic Supplies Kit - Manual (Page 14)

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3.9 Low Battery Warning
When the battery is low, the blinking blue LED
in stand-by mode turns to red and you will hear
mid-toned triple beeps and a voice prompt
saying “Low battery” .
3.10 Checking the Battery Level
You can check the battery level in two different
ways when the Bluetooth Mic is powering on.
3.10.1 LED Indicator
When the Bluetooth Mic is powering on, the
red LED flashes rapidly indicating the battery
level.
4 flashes = High, 70~100%
3 flashes = Medium, 30~70%
2 flashes = Low, 0~30%
3.10.2 Voice Prompt Indicator
When you power on the Bluetooth Mic, keep
pressing the Center Button and the (+) Button
simultaneously for several seconds until you
hear high toned triple beeps. Then you will
hear voice prompt indicating the battery level.
However, if you release the buttons as soon as
the Bluetooth Mic turns on, you will not hear
the voice prompt of battery level indicator.