Product Manual

3When an external speaker with power amplifier is connected, long press the "volume increase key" for 10s to enable the echo cancellation function.
Troubleshooting
Before seeking service from the maintenance personnel or manufacturer, the following steps can be followed for troubleshooting. If the problem cannot be solved, please
consult the dealer or manufacturer.
Fault phenomenon
reason
resolvent
Bluetooth connection failed
Bluetooth connection not turned on
Press the Bluetooth connection key, the Bluetooth indicator flashes,
and then conduct Bluetooth pairing connection