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Receiver beep/vibrate/shock by itself all the time or occasionally

1: Make sure anti bark feature is turned off. After auto mode feature had been turned off, for 218 and 918, auto mode LED light will go off; for 219, auto mode icon (MICROPHONE will disappear); for 919, auto mode incon (SPEAKER) will be hollowed;

2: Make sure Receiver has enough power, because Receiver will alarm when it runs out of power

3: Make sure any buttons of Transmitter has not been touched

4: Sync Receiver with Transmitter once again.

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