KD9561 CK9561 Alarm Module DIY Kit 4 Kind of Sound for Arduino

There are four alarm sound Â£Â¬ but only three are used Â£Â¬ respectivelyÂ£Â¬ 110 public security alarm soundÂ£Â¬ the sound of fire fire 119 Â£Â¬ 120 for medical help rescue the sound of gunfire is another organ is mainly used in the toy . Specific end pre- selected sound audio below :

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