How to Deactivate GDMFFD13C:

1.Locate the ON/OFF button on the GDMFFD13C device.

2.Quickly press the button 5 times within 2 seconds.

3.The device will emit one confirmation beep, and the indicator light will flash 3 times simultaneously.


How to Activate the Recognition Function:

1.Locate the ON/OFF button on the GDMFFD13C device.

2.Quickly press the button 6 times within 2 seconds.

3.The device will emit 6 confirmation beeps, and the indicator light will flash 6 times simultaneously.