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4. Instructions
Step1: Connect the charger and plug in the USB cable. The green indicator will light
on the audio switch. The charging power source has been turned on and is charging
at this time.
* This project version of the sample indicator is only used as a power-on prompt, and
it won't turn off after the charge is completed. The batch version will have a full light
indicator, and Bluetooth connection instructions.
* When the battery is fully charged, disconnect the charger. The system can also be
used normally while charging.
Step 2: boot. Rotate the audio switch according to indication on the switch.
(Please note that there is only one direction). About 3-5 seconds later, the speaker
will hear "dong dong dong", indicating that the audio is turned on at this time.
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